diff --git a/src/Core/Resource/CAnimationParameters.cpp b/src/Core/Resource/CAnimationParameters.cpp
index fac2accf..ab7f8558 100644
--- a/src/Core/Resource/CAnimationParameters.cpp
+++ b/src/Core/Resource/CAnimationParameters.cpp
@@ -1,71 +1,71 @@
 #include "CAnimationParameters.h"
 #include "CAnimSet.h"
 #include "CResCache.h"
+#include "CResourceInfo.h"
 #include <Common/Log.h>
 #include <iostream>
 
 CAnimationParameters::CAnimationParameters()
 {
     mGame = ePrime;
-    mpCharSet = nullptr;
     mNodeIndex = 0;
     mUnknown1 = 0;
     mUnknown2 = 0;
     mUnknown3 = 0;
-    mUnknown4 = 0;
 }
 
 CAnimationParameters::CAnimationParameters(IInputStream& SCLY, EGame Game)
 {
     mGame = Game;
-    mpCharSet = nullptr;
     mNodeIndex = 0;
     mUnknown1 = 0;
     mUnknown2 = 0;
     mUnknown3 = 0;
-    mUnknown4 = 0;
 
     if (Game <= eEchoes)
     {
-        u32 AnimSetID = SCLY.ReadLong();
+        mCharacter = CResourceInfo(SCLY.ReadLong(), "ANCS");
         mNodeIndex = SCLY.ReadLong();
         mUnknown1 = SCLY.ReadLong();
-
-        mpCharSet = gResCache.GetResource(AnimSetID, "ANCS");
     }
 
     else if (Game <= eCorruption)
     {
-        u64 CharID = SCLY.ReadLongLong();
+        mCharacter = CResourceInfo(SCLY.ReadLongLong(), "CHAR");
         mUnknown1 = SCLY.ReadLong();
-
-        mpCharSet = gResCache.GetResource(CharID, "CHAR");
     }
 
     else if (Game == eReturns)
     {
-        SCLY.Seek(-6, SEEK_CUR);
-        u32 Offset = SCLY.Tell();
-        u32 PropID = SCLY.ReadLong();
-        SCLY.Seek(2, SEEK_CUR);
+        u8 Flags = SCLY.ReadByte();
 
-        mUnknown1 = (u32) SCLY.ReadByte();
-        mUnknown1 &= 0xFF;
-
-        if (mUnknown1 == 0x60)
+        // 0x80 - CharacterAnimationSet is empty.
+        if (Flags & 0x80)
         {
-            u64 charID = SCLY.ReadLongLong();
-            mUnknown2 = SCLY.ReadLong();
-            mUnknown3 = SCLY.ReadLong();
-            mUnknown4 = SCLY.ReadLong();
-
-            mpCharSet = gResCache.GetResource(charID, "CHAR");
+            mUnknown1 = -1;
+            mUnknown2 = 0;
+            mUnknown3 = 0;
+            return;
         }
 
-        else if (mUnknown1 != 0x80)
+        mCharacter = CResourceInfo(SCLY.ReadLongLong(), "CHAR");
+
+        // 0x20 - Default Anim is present
+        if (Flags & 0x20)
+            mUnknown1 = SCLY.ReadLong();
+        else
+            mUnknown1 = -1;
+
+        // 0x40 - Two-value struct is present
+        if (Flags & 0x40)
         {
-            Log::FileError(SCLY.GetSourceString(), Offset,
-                           "Unexpected AnimationParameters byte: " + TString::HexString(mUnknown1, true, true, 2) + " (property " + TString::HexString(PropID, true, true, 8) + ")");
+            mUnknown2 = SCLY.ReadLong();
+            mUnknown3 = SCLY.ReadLong();
+        }
+        else
+        {
+            mUnknown2 = 0;
+            mUnknown3 = 0;
         }
     }
 }
@@ -74,9 +74,9 @@ void CAnimationParameters::Write(IOutputStream& rSCLY)
 {
     if (mGame <= eEchoes)
     {
-        if (mpCharSet)
+        if (mCharacter.IsValid())
         {
-            rSCLY.WriteLong(AnimSet()->ResID().ToLong());
+            rSCLY.WriteLong(mCharacter.ID().ToLong());
             rSCLY.WriteLong(mNodeIndex);
             rSCLY.WriteLong(mUnknown1);
         }
@@ -87,26 +87,72 @@ void CAnimationParameters::Write(IOutputStream& rSCLY)
             rSCLY.WriteLong(0xFFFFFFFF);
         }
     }
+
+    else if (mGame <= eCorruption)
+    {
+        if (mCharacter.IsValid())
+        {
+            rSCLY.WriteLongLong(mCharacter.ID().ToLongLong());
+            rSCLY.WriteLong(mUnknown1);
+        }
+
+        else
+        {
+            rSCLY.WriteLongLong(CUniqueID::skInvalidID64.ToLongLong());
+            rSCLY.WriteLong(0xFFFFFFFF);
+        }
+    }
+
+    else
+    {
+        if (!mCharacter.IsValid())
+            rSCLY.WriteByte((u8) 0x80);
+
+        else
+        {
+            u8 Flag = 0;
+            if (mUnknown1 != -1) Flag |= 0x20;
+            if (mUnknown2 != 0 || mUnknown3 != 0) Flag |= 0x40;
+
+            rSCLY.WriteByte(Flag);
+            rSCLY.WriteLongLong(mCharacter.ID().ToLongLong());
+
+            if (Flag & 0x20)
+                rSCLY.WriteLong(mUnknown1);
+
+            if (Flag & 0x40)
+            {
+                rSCLY.WriteLong(mUnknown2);
+                rSCLY.WriteLong(mUnknown3);
+            }
+        }
+    }
 }
 
 CModel* CAnimationParameters::GetCurrentModel(s32 NodeIndex /*= -1*/)
 {
-    if (!mpCharSet) return nullptr;
-    if (mpCharSet->Type() != eAnimSet) return nullptr;
+    if (!mCharacter.IsValid()) return nullptr;
+
+    CAnimSet *pSet = (CAnimSet*) mCharacter.Load();
+    if (!pSet) return nullptr;
+    if (pSet->Type() != eAnimSet) return nullptr;
     if (NodeIndex == -1) NodeIndex = mNodeIndex;
 
-    if (mpCharSet->getNodeCount() <= (u32) NodeIndex) return nullptr;
-    return mpCharSet->getNodeModel(NodeIndex);
+    if (pSet->getNodeCount() <= (u32) NodeIndex) return nullptr;
+    return pSet->getNodeModel(NodeIndex);
 }
 
 TString CAnimationParameters::GetCurrentCharacterName(s32 NodeIndex /*= -1*/)
 {
-    if (!mpCharSet) return "";
-    if (mpCharSet->Type() != eAnimSet) return "";
+    if (!mCharacter.IsValid()) return "";
+
+    CAnimSet *pSet = (CAnimSet*) mCharacter.Load();
+    if (!pSet) return "";
+    if (pSet->Type() != eAnimSet) return "";
     if (NodeIndex == -1) NodeIndex = mNodeIndex;
 
-    if (mpCharSet->getNodeCount() <= (u32) NodeIndex) return "";
-    return mpCharSet->getNodeName((u32) NodeIndex);
+    if (pSet->getNodeCount() <= (u32) NodeIndex) return "";
+    return pSet->getNodeName((u32) NodeIndex);
 }
 
 // ************ GETTERS ************
@@ -117,7 +163,7 @@ EGame CAnimationParameters::Version()
 
 CAnimSet* CAnimationParameters::AnimSet()
 {
-    return mpCharSet;
+    return (CAnimSet*) mCharacter.Load();
 }
 
 u32 CAnimationParameters::CharacterIndex()
@@ -132,21 +178,20 @@ u32 CAnimationParameters::Unknown(u32 Index)
     case 0: return mUnknown1;
     case 1: return mUnknown2;
     case 2: return mUnknown3;
-    case 3: return mUnknown4;
     default: return 0;
     }
 }
 
 // ************ SETTERS ************
-void CAnimationParameters::SetResource(CResource *pRes)
+void CAnimationParameters::SetResource(CResourceInfo Res)
 {
-    if (!pRes || (pRes->Type() == eAnimSet) || (pRes->Type() == eCharacter))
+    if (Res.Type() == "ANCS" || Res.Type() == "CHAR")
     {
-        mpCharSet = pRes;
+        mCharacter = Res;
         mNodeIndex = 0;
     }
     else
-        Log::Error("Resource with invalid type passed to CAnimationParameters: " + pRes->Source());
+        Log::Error("Resource with invalid type passed to CAnimationParameters: " + Res.ToString());
 }
 
 void CAnimationParameters::SetNodeIndex(u32 Index)
@@ -161,6 +206,5 @@ void CAnimationParameters::SetUnknown(u32 Index, u32 Value)
     case 0: mUnknown1 = Value;
     case 1: mUnknown2 = Value;
     case 2: mUnknown3 = Value;
-    case 3: mUnknown4 = Value;
     }
 }
diff --git a/src/Core/Resource/CAnimationParameters.h b/src/Core/Resource/CAnimationParameters.h
index 6ffaf5f3..97ba3877 100644
--- a/src/Core/Resource/CAnimationParameters.h
+++ b/src/Core/Resource/CAnimationParameters.h
@@ -2,6 +2,7 @@
 #define CANIMATIONPARAMETERS_H
 
 #include "CAnimSet.h"
+#include "CResourceInfo.h"
 #include "EGame.h"
 #include "TResPtr.h"
 #include "Core/Resource/Model/CModel.h"
@@ -9,13 +10,12 @@
 class CAnimationParameters
 {
     EGame mGame;
-    TResPtr<CAnimSet> mpCharSet;
+    CResourceInfo mCharacter;
 
     u32 mNodeIndex;
     u32 mUnknown1;
     u32 mUnknown2;
     u32 mUnknown3;
-    u32 mUnknown4;
 
 public:
     CAnimationParameters();
@@ -32,7 +32,7 @@ public:
     u32 Unknown(u32 index);
 
     // Setters
-    void SetResource(CResource *pRes);
+    void SetResource(CResourceInfo Res);
     void SetNodeIndex(u32 Index);
     void SetUnknown(u32 Index, u32 Value);
 
@@ -40,12 +40,11 @@ public:
     inline bool operator==(const CAnimationParameters& rkOther) const
     {
         return ( (mGame == rkOther.mGame) &&
-                 (mpCharSet == rkOther.mpCharSet) &&
+                 (mCharacter == rkOther.mCharacter) &&
                  (mNodeIndex == rkOther.mNodeIndex) &&
                  (mUnknown1 == rkOther.mUnknown1) &&
                  (mUnknown2 == rkOther.mUnknown2) &&
-                 (mUnknown3 == rkOther.mUnknown3) &&
-                 (mUnknown4 == rkOther.mUnknown4) );
+                 (mUnknown3 == rkOther.mUnknown3) );
     }
 };
 
diff --git a/src/Core/Resource/CGameArea.cpp b/src/Core/Resource/CGameArea.cpp
index f6d22aaa..047ee4fe 100644
--- a/src/Core/Resource/CGameArea.cpp
+++ b/src/Core/Resource/CGameArea.cpp
@@ -7,6 +7,8 @@ CGameArea::CGameArea() : CResource()
     mVertexCount = 0;
     mTriangleCount = 0;
     mTerrainMerged = false;
+    mOriginalWorldMeshCount = 0;
+    mUsesCompression = false;
     mMaterialSet = nullptr;
     mpGeneratorLayer = nullptr;
     mCollision = nullptr;
diff --git a/src/Core/Resource/CGameArea.h b/src/Core/Resource/CGameArea.h
index c6bdffe3..81c68864 100644
--- a/src/Core/Resource/CGameArea.h
+++ b/src/Core/Resource/CGameArea.h
@@ -29,8 +29,18 @@ class CGameArea : public CResource
     CTransform4f mTransform;
     CAABox mAABox;
 
-    // Section data buffers; this is used to avoid having to regenerate the entire contents of the file on cook
+    // Data saved from the original file to help on recook
     std::vector<std::vector<u8>> mSectionDataBuffers;
+    u32 mOriginalWorldMeshCount;
+    bool mUsesCompression;
+
+    struct SSectionNumber
+    {
+        CFourCC SectionID;
+        u32 Index;
+    };
+    std::vector<SSectionNumber> mSectionNumbers;
+
     // Geometry
     CMaterialSet *mMaterialSet;
     std::vector<CModel*> mTerrainModels; // TerrainModels is the original version of each model; this is currently mainly used in the POI map editor
@@ -39,7 +49,6 @@ class CGameArea : public CResource
     std::vector<CScriptLayer*> mScriptLayers;
     CScriptLayer *mpGeneratorLayer;
     std::unordered_map<u32, CScriptObject*> mObjectMap;
-
     // Collision
     CCollisionMeshGroup *mCollision;
     // Lights
diff --git a/src/Core/Resource/CWorld.cpp b/src/Core/Resource/CWorld.cpp
index a60b669b..52366b3e 100644
--- a/src/Core/Resource/CWorld.cpp
+++ b/src/Core/Resource/CWorld.cpp
@@ -25,6 +25,7 @@ void CWorld::SetAreaLayerInfo(CGameArea *pArea, u32 AreaIndex)
 
     for (u32 iLyr = 0; iLyr < pArea->GetScriptLayerCount(); iLyr++)
     {
+        if (AreaInfo.Layers.size() <= iLyr) break;
         CScriptLayer *pLayer = pArea->GetScriptLayer(iLyr);
         SArea::SLayer& LayerInfo = AreaInfo.Layers[iLyr];
 
diff --git a/src/Core/Resource/Cooker/CAreaCooker.cpp b/src/Core/Resource/Cooker/CAreaCooker.cpp
index 266b1168..932a676d 100644
--- a/src/Core/Resource/Cooker/CAreaCooker.cpp
+++ b/src/Core/Resource/Cooker/CAreaCooker.cpp
@@ -1,80 +1,190 @@
 #include "CAreaCooker.h"
 #include "CScriptCooker.h"
+#include <Common/CompressionUtil.h>
 #include <Common/Log.h>
 
+const bool gkForceDisableCompression = false;
+
 CAreaCooker::CAreaCooker()
 {
 }
 
-void CAreaCooker::DetermineSectionNumbers()
+void CAreaCooker::DetermineSectionNumbersPrime()
 {
     mGeometrySecNum = 0;
 
     // Determine how many sections are taken up by geometry...
-    u32 GeometrySections = 1; // Starting at 1 to account for materials
+    // Each world mesh has 7-9 sections (depending on game) plus one section per surface.
+    u32 GeometrySections = 0;
+    u32 OriginalMeshCount = mpArea->mOriginalWorldMeshCount;
 
-    // Each world mesh has (7 + surface count) sections
-    // header, verts, normals, colors, float UVs, short UVs, surface offsets + surfaces
-    for (u32 iMesh = 0; iMesh < mpArea->mTerrainModels.size(); iMesh++)
+    switch (mVersion)
     {
-        CModel *pModel = mpArea->mTerrainModels[iMesh];
-        GeometrySections += (7 + pModel->GetSurfaceCount());
+    case ePrimeDemo:
+    case ePrime:
+        GeometrySections = 1 + (7 * OriginalMeshCount); // Accounting for materials
+        break;
+    case eEchoesDemo:
+        GeometrySections = 2 + (9 * OriginalMeshCount); // Account for materials + AROT
+        break;
+    case eEchoes:
+        GeometrySections = 3 + (9 * OriginalMeshCount); // Acount for materials + AROT + an unknown section
+        break;
     }
 
+    for (u32 iMesh = 0; iMesh < mpArea->mTerrainModels.size(); iMesh++)
+        GeometrySections += mpArea->mTerrainModels[iMesh]->GetSurfaceCount();
+
     // Set section numbers
-    mArotSecNum = mGeometrySecNum + GeometrySections;
-    mSclySecNum = mArotSecNum + 1;
-    mCollisionSecNum = mSclySecNum + 1;
-    mUnknownSecNum = mCollisionSecNum + 1;
-    mLightsSecNum = mUnknownSecNum + 1;
-    mVisiSecNum = mLightsSecNum + 1;
-    mPathSecNum = mVisiSecNum + 1;
+    u32 SecNum = GeometrySections;
+    if (mVersion <= ePrime) mAROTSecNum = SecNum++;
+    if (mVersion >= eEchoesDemo) mFFFFSecNum = SecNum++;
+
+    if (mVersion >= eEchoesDemo)
+    {
+        mSCLYSecNum = SecNum;
+        SecNum += (mVersion >= eEchoes ? mpArea->mScriptLayers.size() : 1);
+        mSCGNSecNum = SecNum++;
+    }
+    else
+        mSCLYSecNum = SecNum++;
+
+    mCollisionSecNum = SecNum++;
+    mUnknownSecNum = SecNum++;
+    mLightsSecNum = SecNum++;
+    mVISISecNum = SecNum++;
+    mPATHSecNum = SecNum++;
+
+    if (mVersion >= eEchoesDemo)
+    {
+        mPTLASecNum = SecNum++;
+        mEGMCSecNum = SecNum++;
+    }
 }
 
+void CAreaCooker::DetermineSectionNumbersCorruption()
+{
+    // Because we're copying these from the original file (because not all the numbers
+    // are present in every file), we don't care about any of these except SCLY and SCGN.
+    for (u32 iNum = 0; iNum < mpArea->mSectionNumbers.size(); iNum++)
+    {
+        CGameArea::SSectionNumber& rNum = mpArea->mSectionNumbers[iNum];
+        if (rNum.SectionID == "SOBJ") mSCLYSecNum = rNum.Index;
+        else if (rNum.SectionID == "SGEN") mSCGNSecNum = rNum.Index;
+    }
+}
+
+// ************ HEADER ************
 void CAreaCooker::WritePrimeHeader(IOutputStream& rOut)
 {
     rOut.WriteLong(0xDEADBEEF);
     rOut.WriteLong(GetMREAVersion(mVersion));
     mpArea->mTransform.Write(rOut);
-    rOut.WriteLong(mpArea->mTerrainModels.size());
+    rOut.WriteLong(mpArea->mOriginalWorldMeshCount);
+    if (mVersion >= eEchoes) rOut.WriteLong(mpArea->mScriptLayers.size());
     rOut.WriteLong(mpArea->mSectionDataBuffers.size());
 
     rOut.WriteLong(mGeometrySecNum);
-    rOut.WriteLong(mSclySecNum);
+    rOut.WriteLong(mSCLYSecNum);
+    if (mVersion >= eEchoesDemo) rOut.WriteLong(mSCGNSecNum);
     rOut.WriteLong(mCollisionSecNum);
     rOut.WriteLong(mUnknownSecNum);
     rOut.WriteLong(mLightsSecNum);
-    rOut.WriteLong(mVisiSecNum);
-    rOut.WriteLong(mPathSecNum);
-    rOut.WriteLong(mArotSecNum);
+    rOut.WriteLong(mVISISecNum);
+    rOut.WriteLong(mPATHSecNum);
+    if (mVersion <= ePrime) rOut.WriteLong(mAROTSecNum);
 
-    mSectionSizesOffset = rOut.Tell();
-    for (u32 iSec = 0; iSec < mpArea->mSectionDataBuffers.size(); iSec++)
-        rOut.WriteLong(0);
+    else
+    {
+        rOut.WriteLong(mFFFFSecNum);
+        rOut.WriteLong(mPTLASecNum);
+        rOut.WriteLong(mEGMCSecNum);
+    }
+
+    if (mVersion >= eEchoesDemo)
+    {
+        if (mVersion >= eEchoes) rOut.WriteLong(mCompressedBlocks.size());
+        rOut.WriteToBoundary(32, 0);
+    }
+
+    for (u32 iSec = 0; iSec < mSectionSizes.size(); iSec++)
+        rOut.WriteLong(mSectionSizes[iSec]);
+    rOut.WriteToBoundary(32, 0);
+
+    if (mVersion >= eEchoes)
+        WriteCompressionHeader(rOut);
+}
+
+void CAreaCooker::WriteCorruptionHeader(IOutputStream& rOut)
+{
+    rOut.WriteLong(0xDEADBEEF);
+    rOut.WriteLong(GetMREAVersion(mVersion));
+    mpArea->mTransform.Write(rOut);
+    rOut.WriteLong(mpArea->mOriginalWorldMeshCount);
+    rOut.WriteLong(mpArea->mScriptLayers.size());
+    rOut.WriteLong(mpArea->mSectionDataBuffers.size());
+    rOut.WriteLong(mCompressedBlocks.size());
+    rOut.WriteLong(mpArea->mSectionNumbers.size());
+    rOut.WriteToBoundary(32, 0);
+
+    for (u32 iSec = 0; iSec < mSectionSizes.size(); iSec++)
+        rOut.WriteLong(mSectionSizes[iSec]);
 
     rOut.WriteToBoundary(32, 0);
 
-    mSectionMgr.SetSectionCount(mpArea->mSectionDataBuffers.size());
-    mSectionMgr.Init(rOut);
+    WriteCompressionHeader(rOut);
+
+    for (u32 iNum = 0; iNum < mpArea->mSectionNumbers.size(); iNum++)
+    {
+        CGameArea::SSectionNumber& rNum = mpArea->mSectionNumbers[iNum];
+        rOut.WriteLong(rNum.SectionID.ToLong());
+        rOut.WriteLong(rNum.Index);
+    }
+    rOut.WriteToBoundary(32, 0);
 }
 
+void CAreaCooker::WriteCompressionHeader(IOutputStream& rOut)
+{
+    for (u32 iCmp = 0; iCmp < mCompressedBlocks.size(); iCmp++)
+    {
+        SCompressedBlock& rBlock = mCompressedBlocks[iCmp];
+        bool IsCompressed = (rBlock.CompressedSize != 0);
+
+        rOut.WriteLong(IsCompressed ? rBlock.DecompressedSize + 0x120 : rBlock.DecompressedSize);
+        rOut.WriteLong(rBlock.DecompressedSize);
+        rOut.WriteLong(rBlock.CompressedSize);
+        rOut.WriteLong(rBlock.NumSections);
+    }
+
+    rOut.WriteToBoundary(32, 0);
+}
+
+void CAreaCooker::WriteAreaData(IOutputStream& rOut)
+{
+    rOut.WriteBytes(mAreaData.Data(), mAreaData.Size());
+    rOut.WriteToBoundary(32, 0);
+}
+
+// ************ SCLY ************
 void CAreaCooker::WritePrimeSCLY(IOutputStream& rOut)
 {
-    u32 NumLayers = mpArea->mScriptLayers.size();
     rOut.WriteString("SCLY", 4);
-    rOut.WriteLong(0x1); // Unknown value, but it's always 1
+    mVersion <= ePrime ? rOut.WriteLong(1) : rOut.WriteByte(1);
+
+    u32 NumLayers = mpArea->mScriptLayers.size();
     rOut.WriteLong(NumLayers);
 
     u32 LayerSizesStart = rOut.Tell();
     for (u32 iLyr = 0; iLyr < NumLayers; iLyr++)
         rOut.WriteLong(0);
 
+    // SCLY
     std::vector<u32> LayerSizes(NumLayers);
 
-    for (u32 iLyr = 0; iLyr < mpArea->mScriptLayers.size(); iLyr++)
+    for (u32 iLyr = 0; iLyr < NumLayers; iLyr++)
     {
         u32 LayerStart = rOut.Tell();
-        CScriptCooker::WriteLayer(mpArea->Version(), mpArea->mScriptLayers[iLyr], rOut);
+        CScriptCooker::WriteLayer(mVersion, mpArea->mScriptLayers[iLyr], rOut);
         LayerSizes[iLyr] = rOut.Tell() - LayerStart;
     }
 
@@ -85,7 +195,114 @@ void CAreaCooker::WritePrimeSCLY(IOutputStream& rOut)
         rOut.WriteLong(LayerSizes[iLyr]);
 
     rOut.Seek(LayersEnd, SEEK_SET);
-    rOut.WriteToBoundary(32, 0);
+    FinishSection(false);
+
+    // SCGN
+    if (mVersion == eEchoesDemo)
+    {
+        rOut.WriteString("SCGN", 4);
+        rOut.WriteByte(1);
+        CScriptCooker::WriteLayer(mVersion, mpArea->mpGeneratorLayer, rOut);
+        FinishSection(false);
+    }
+}
+
+void CAreaCooker::WriteEchoesSCLY(IOutputStream& rOut)
+{
+    // SCLY
+    for (u32 iLyr = 0; iLyr < mpArea->mScriptLayers.size(); iLyr++)
+    {
+        rOut.WriteString("SCLY", 4);
+        rOut.WriteByte(0x1);
+        rOut.WriteLong(iLyr);
+        CScriptCooker::WriteLayer(mVersion, mpArea->mScriptLayers[iLyr], rOut);
+        FinishSection(true);
+    }
+
+    // SCGN
+    rOut.WriteString("SCGN", 4);
+    rOut.WriteByte(0x1);
+    CScriptCooker::WriteLayer(mVersion, mpArea->mpGeneratorLayer, rOut);
+    FinishSection(true);
+}
+
+// ************ SECTION MANAGEMENT ************
+void CAreaCooker::AddSectionToBlock()
+{
+    mCompressedData.WriteBytes(mSectionData.Data(), mSectionData.Size());
+    mCompressedData.WriteToBoundary(32, 0);
+    mCurBlock.DecompressedSize += mSectionData.Size();
+    mCurBlock.NumSections++;
+}
+
+void CAreaCooker::FinishSection(bool SingleSectionBlock)
+{
+    // Our section data is now finished in mSection...
+    const u32 kSizeThreshold = 0x20000;
+    mSectionData.WriteToBoundary(32, 0);
+
+    u32 SecSize = mSectionData.Size();
+    mSectionSizes.push_back(SecSize);
+
+    // Only track compressed blocks for MP2+. Write everything to one block for MP1.
+    if (mVersion >= eEchoes)
+    {
+        // Finish the current block if this is a single section block OR if the new section would push the block over the size limit.
+        if (mCurBlock.NumSections > 0 && (mCurBlock.DecompressedSize + SecSize > kSizeThreshold || SingleSectionBlock))
+            FinishBlock();
+
+        AddSectionToBlock();
+
+        // And finally for a single section block, finish the new block.
+        if (SingleSectionBlock)
+            FinishBlock();
+    }
+
+    else AddSectionToBlock();
+
+    mSectionData.Clear();
+}
+
+void CAreaCooker::FinishBlock()
+{
+    if (mCurBlock.NumSections == 0) return;
+
+    std::vector<u8> CompressedBuf(mCompressedData.Size() * 2);
+    bool EnableCompression = (mVersion >= eEchoes) && mpArea->mUsesCompression && !gkForceDisableCompression;
+    bool UseZlib = (mVersion == eReturns);
+
+    u32 CompressedSize = 0;
+    bool WriteCompressedData = false;
+
+    if (EnableCompression)
+    {
+        bool Success = CompressionUtil::CompressSegmentedData((u8*) mCompressedData.Data(), mCompressedData.Size(), CompressedBuf.data(), CompressedSize, UseZlib);
+        u32 PadBytes = (32 - (CompressedSize % 32)) & 0x3F;
+        WriteCompressedData = Success && (CompressedSize + PadBytes < (u32) mCompressedData.Size());
+    }
+
+    if (WriteCompressedData)
+    {
+        u32 PadBytes = 32 - (CompressedSize % 32);
+        PadBytes &= 0x3F;
+
+        for (u32 iPad = 0; iPad < PadBytes; iPad++)
+            mAreaData.WriteByte(0);
+
+        mAreaData.WriteBytes(CompressedBuf.data(), CompressedSize);
+        mCurBlock.CompressedSize = CompressedSize;
+    }
+
+    else
+    {
+        mAreaData.WriteBytes(mCompressedData.Data(), mCompressedData.Size());
+        mAreaData.WriteToBoundary(32, 0);
+        mCurBlock.CompressedSize = 0;
+    }
+
+    mCompressedData.Clear();
+    mCompressedBlocks.push_back(mCurBlock);
+    mCurBlock = SCompressedBlock();
 }
 
 // ************ STATIC ************
@@ -95,39 +312,41 @@ void CAreaCooker::WriteCookedArea(CGameArea *pArea, IOutputStream& rOut)
     Cooker.mpArea = pArea;
     Cooker.mVersion = pArea->Version();
 
-    if (Cooker.mVersion > ePrime)
-    {
-        Log::Error("Area cooking is not supported for games other than Metroid Prime");
-        return;
-    }
-
-    // Write header
-    Cooker.DetermineSectionNumbers();
-    Cooker.WritePrimeHeader(rOut);
+    if (Cooker.mVersion <= eEchoes)
+        Cooker.DetermineSectionNumbersPrime();
+    else
+        Cooker.DetermineSectionNumbersCorruption();
 
     // Write pre-SCLY data sections
-    for (u32 iSec = 0; iSec < Cooker.mSclySecNum; iSec++)
+    for (u32 iSec = 0; iSec < Cooker.mSCLYSecNum; iSec++)
     {
-        rOut.WriteBytes(pArea->mSectionDataBuffers[iSec].data(), pArea->mSectionDataBuffers[iSec].size());
-        Cooker.mSectionMgr.AddSize(rOut);
+        Cooker.mSectionData.WriteBytes(pArea->mSectionDataBuffers[iSec].data(), pArea->mSectionDataBuffers[iSec].size());
+        Cooker.FinishSection(false);
     }
 
     // Write SCLY
-    Cooker.WritePrimeSCLY(rOut);
-    Cooker.mSectionMgr.AddSize(rOut);
+    if (Cooker.mVersion <= eEchoesDemo)
+        Cooker.WritePrimeSCLY(Cooker.mSectionData);
+    else
+        Cooker.WriteEchoesSCLY(Cooker.mSectionData);
 
     // Write post-SCLY data sections
-    for (u32 iSec = Cooker.mSclySecNum + 1; iSec < pArea->mSectionDataBuffers.size(); iSec++)
+    u32 PostSCLY = (Cooker.mVersion <= ePrime ? Cooker.mSCLYSecNum + 1 : Cooker.mSCGNSecNum + 1);
+    for (u32 iSec = PostSCLY; iSec < pArea->mSectionDataBuffers.size(); iSec++)
     {
-        rOut.WriteBytes(pArea->mSectionDataBuffers[iSec].data(), pArea->mSectionDataBuffers[iSec].size());
-        Cooker.mSectionMgr.AddSize(rOut);
+        Cooker.mSectionData.WriteBytes(pArea->mSectionDataBuffers[iSec].data(), pArea->mSectionDataBuffers[iSec].size());
+        Cooker.FinishSection(false);
     }
 
-    // Write section sizes
-    u32 AreaEnd = rOut.Tell();
-    rOut.Seek(Cooker.mSectionSizesOffset, SEEK_SET);
-    Cooker.mSectionMgr.WriteSizes(rOut);
-    rOut.Seek(AreaEnd, SEEK_SET);
+    Cooker.FinishBlock();
+
+    // Write to actual file
+    if (Cooker.mVersion <= eEchoes)
+        Cooker.WritePrimeHeader(rOut);
+    else
+        Cooker.WriteCorruptionHeader(rOut);
+
+    Cooker.WriteAreaData(rOut);
 }
 
 u32 CAreaCooker::GetMREAVersion(EGame version)
diff --git a/src/Core/Resource/Cooker/CAreaCooker.h b/src/Core/Resource/Cooker/CAreaCooker.h
index e6c6e371..3c773735 100644
--- a/src/Core/Resource/Cooker/CAreaCooker.h
+++ b/src/Core/Resource/Cooker/CAreaCooker.h
@@ -11,22 +11,56 @@ class CAreaCooker
     TResPtr<CGameArea> mpArea;
     EGame mVersion;
 
-    CSectionMgrOut mSectionMgr;
-    u32 mSectionSizesOffset;
+    std::vector<u32> mSectionSizes;
 
     u32 mGeometrySecNum;
-    u32 mSclySecNum;
+    u32 mSCLYSecNum;
+    u32 mSCGNSecNum;
     u32 mCollisionSecNum;
     u32 mUnknownSecNum;
     u32 mLightsSecNum;
-    u32 mVisiSecNum;
-    u32 mPathSecNum;
-    u32 mArotSecNum;
+    u32 mVISISecNum;
+    u32 mPATHSecNum;
+    u32 mAROTSecNum;
+    u32 mFFFFSecNum;
+    u32 mPTLASecNum;
+    u32 mEGMCSecNum;
+
+    struct SCompressedBlock
+    {
+        u32 CompressedSize;
+        u32 DecompressedSize;
+        u32 NumSections;
+
+        SCompressedBlock()
+            : CompressedSize(0), DecompressedSize(0), NumSections(0) {}
+    };
+
+    SCompressedBlock mCurBlock;
+    CVectorOutStream mSectionData;
+    CVectorOutStream mCompressedData;
+    CVectorOutStream mAreaData;
+
+    std::vector<SCompressedBlock> mCompressedBlocks;
 
     CAreaCooker();
-    void DetermineSectionNumbers();
+    void DetermineSectionNumbersPrime();
+    void DetermineSectionNumbersCorruption();
+
+    // Header
     void WritePrimeHeader(IOutputStream& rOut);
+    void WriteCorruptionHeader(IOutputStream& rOut);
+    void WriteCompressionHeader(IOutputStream& rOut);
+    void WriteAreaData(IOutputStream& rOut);
+
+    // SCLY
     void WritePrimeSCLY(IOutputStream& rOut);
+    void WriteEchoesSCLY(IOutputStream& rOut);
+
+    // Section Management
+    void AddSectionToBlock();
+    void FinishSection(bool ForceFinishBlock);
+    void FinishBlock();
 
 public:
     static void WriteCookedArea(CGameArea *pArea, IOutputStream& rOut);
diff --git a/src/Core/Resource/Cooker/CScriptCooker.cpp b/src/Core/Resource/Cooker/CScriptCooker.cpp
index 878d6254..a07be1bb 100644
--- a/src/Core/Resource/Cooker/CScriptCooker.cpp
+++ b/src/Core/Resource/Cooker/CScriptCooker.cpp
@@ -1,7 +1,17 @@
 #include "CScriptCooker.h"
 
-void CScriptCooker::WriteProperty(IProperty *pProp)
+void CScriptCooker::WriteProperty(IProperty *pProp, bool InSingleStruct)
 {
+    u32 SizeOffset = 0, PropStart = 0;
+
+    if (mVersion >= eEchoesDemo && !InSingleStruct)
+    {
+        mpSCLY->WriteLong(pProp->ID());
+        SizeOffset = mpSCLY->Tell();
+        mpSCLY->WriteShort(0x0);
+        PropStart = mpSCLY->Tell();
+    }
+
     switch (pProp->Type())
     {
 
@@ -96,25 +106,81 @@ void CScriptCooker::WriteProperty(IProperty *pProp)
     {
         TMayaSplineProperty *pSplineCast = static_cast<TMayaSplineProperty*>(pProp);
         std::vector<u8> Buffer = pSplineCast->Get();
-        mpSCLY->WriteBytes(Buffer.data(), Buffer.size());
+        if (!Buffer.empty()) mpSCLY->WriteBytes(Buffer.data(), Buffer.size());
+
+        else
+        {
+            if (mVersion < eReturns)
+            {
+                mpSCLY->WriteShort(0);
+                mpSCLY->WriteLong(0);
+                mpSCLY->WriteByte(1);
+                mpSCLY->WriteFloat(0);
+                mpSCLY->WriteFloat(1);
+            }
+            else
+            {
+                mpSCLY->WriteLong(0);
+                mpSCLY->WriteFloat(0);
+                mpSCLY->WriteFloat(1);
+                mpSCLY->WriteShort(0);
+                mpSCLY->WriteByte(1);
+            }
+        }
+
         break;
     }
 
     case eStructProperty:
-    case eArrayProperty:
     {
         CPropertyStruct *pStruct = static_cast<CPropertyStruct*>(pProp);
         CStructTemplate *pTemp = static_cast<CStructTemplate*>(pStruct->Template());
 
-        if (!pTemp->IsSingleProperty() || pProp->Type() == eArrayProperty)
-            mpSCLY->WriteLong(pStruct->Count());
+        std::vector<IProperty*> PropertiesToWrite;
 
         for (u32 iProp = 0; iProp < pStruct->Count(); iProp++)
-            WriteProperty(pStruct->PropertyByIndex(iProp));
+        {
+            IProperty *pSubProp = pStruct->PropertyByIndex(iProp);
+            ECookPreference Pref = pSubProp->Template()->CookPreference();
+            if (Pref == eNeverCook) continue;
+
+            if (mVersion < eReturns || pTemp->IsSingleProperty() || Pref == eAlwaysCook || !pSubProp->MatchesDefault())
+                PropertiesToWrite.push_back(pSubProp);
+        }
+
+        if (!pTemp->IsSingleProperty())
+        {
+            if (mVersion <= ePrime)
+                mpSCLY->WriteLong(PropertiesToWrite.size());
+            else
+                mpSCLY->WriteShort((u16) PropertiesToWrite.size());
+        }
+
+        for (u32 iProp = 0; iProp < PropertiesToWrite.size(); iProp++)
+            WriteProperty(PropertiesToWrite[iProp], pTemp->IsSingleProperty());
 
         break;
     }
 
+    case eArrayProperty:
+    {
+        CArrayProperty *pArray = static_cast<CArrayProperty*>(pProp);
+        mpSCLY->WriteLong(pArray->Count());
+
+        for (u32 iProp = 0; iProp < pArray->Count(); iProp++)
+            WriteProperty(pArray->PropertyByIndex(iProp), true);
+
+        break;
+    }
+
+    }
+
+    if (SizeOffset != 0)
+    {
+        u32 PropEnd = mpSCLY->Tell();
+        mpSCLY->Seek(SizeOffset, SEEK_SET);
+        mpSCLY->WriteShort((u16) (PropEnd - PropStart));
+        mpSCLY->Seek(PropEnd, SEEK_SET);
     }
 }
 
@@ -157,12 +223,61 @@ void CScriptCooker::WriteInstanceMP1(CScriptObject *pInstance)
         mpSCLY->WriteLong(rkLink.ObjectID);
     }
 
-    WriteProperty(pInstance->Properties());
+    WriteProperty(pInstance->Properties(), false);
     u32 InstanceEnd = mpSCLY->Tell();
-    u32 InstanceSize = InstanceEnd - InstanceStart;
 
     mpSCLY->Seek(SizeOffset, SEEK_SET);
-    mpSCLY->WriteLong(InstanceSize);
+    mpSCLY->WriteLong(InstanceEnd - InstanceStart);
+    mpSCLY->Seek(InstanceEnd, SEEK_SET);
+}
+
+void CScriptCooker::WriteLayerMP2(CScriptLayer *pLayer)
+{
+    u32 LayerStart = mpSCLY->Tell();
+    mpSCLY->WriteByte(0x1);
+    mpSCLY->WriteLong(pLayer->NumInstances());
+
+    for (u32 iInst = 0; iInst < pLayer->NumInstances(); iInst++)
+    {
+        CScriptObject *pInstance = pLayer->InstanceByIndex(iInst);
+        WriteInstanceMP2(pInstance);
+    }
+
+    if (mVersion == eEchoesDemo)
+    {
+        u32 LayerSize = mpSCLY->Tell() - LayerStart;
+        u32 NumPadBytes = 32 - (LayerSize % 32);
+        if (NumPadBytes == 32) NumPadBytes = 0;
+
+        for (u32 iPad = 0; iPad < NumPadBytes; iPad++)
+            mpSCLY->WriteByte(0);
+    }
+}
+
+void CScriptCooker::WriteInstanceMP2(CScriptObject *pInstance)
+{
+    mpSCLY->WriteLong(pInstance->ObjectTypeID());
+
+    u32 SizeOffset = mpSCLY->Tell();
+    mpSCLY->WriteShort(0);
+    u32 InstanceStart = mpSCLY->Tell();
+
+    mpSCLY->WriteLong(pInstance->InstanceID());
+    mpSCLY->WriteShort((u16) pInstance->NumOutLinks());
+
+    for (u32 iLink = 0; iLink < pInstance->NumOutLinks(); iLink++)
+    {
+        const SLink& rkLink = pInstance->OutLink(iLink);
+        mpSCLY->WriteLong(rkLink.State);
+        mpSCLY->WriteLong(rkLink.Message);
+        mpSCLY->WriteLong(rkLink.ObjectID);
+    }
+
+    WriteProperty(pInstance->Properties(), false);
+    u32 InstanceEnd = mpSCLY->Tell();
+
+    mpSCLY->Seek(SizeOffset, SEEK_SET);
+    mpSCLY->WriteShort((u16) (InstanceEnd - InstanceStart));
     mpSCLY->Seek(InstanceEnd, SEEK_SET);
 }
 
@@ -172,5 +287,9 @@ void CScriptCooker::WriteLayer(EGame Game, CScriptLayer *pLayer, IOutputStream&
     CScriptCooker Cooker;
     Cooker.mpSCLY = &rOut;
     Cooker.mVersion = Game;
-    Cooker.WriteLayerMP1(pLayer);
+
+    if (Game <= ePrime)
+        Cooker.WriteLayerMP1(pLayer);
+    else
+        Cooker.WriteLayerMP2(pLayer);
 }
diff --git a/src/Core/Resource/Cooker/CScriptCooker.h b/src/Core/Resource/Cooker/CScriptCooker.h
index 9e7e5b85..fd8fbdec 100644
--- a/src/Core/Resource/Cooker/CScriptCooker.h
+++ b/src/Core/Resource/Cooker/CScriptCooker.h
@@ -12,9 +12,11 @@ class CScriptCooker
     EGame mVersion;
 
     CScriptCooker() {}
-    void WriteProperty(IProperty *pProp);
+    void WriteProperty(IProperty *pProp, bool InSingleStruct);
     void WriteLayerMP1(CScriptLayer *pLayer);
     void WriteInstanceMP1(CScriptObject *pInstance);
+    void WriteLayerMP2(CScriptLayer *pLayer);
+    void WriteInstanceMP2(CScriptObject *pInstance);
 
 public:
     static void WriteLayer(EGame Game, CScriptLayer *pLayer, IOutputStream& rOut);
diff --git a/src/Core/Resource/Factory/CAreaLoader.cpp b/src/Core/Resource/Factory/CAreaLoader.cpp
index f9143db9..1119bb99 100644
--- a/src/Core/Resource/Factory/CAreaLoader.cpp
+++ b/src/Core/Resource/Factory/CAreaLoader.cpp
@@ -63,6 +63,8 @@ void CAreaLoader::ReadHeaderPrime()
     mpMREA->SeekToBoundary(32);
     mpSectionMgr->Init();
     LoadSectionDataBuffers();
+
+    mpArea->mOriginalWorldMeshCount = mNumMeshes;
 }
 
 void CAreaLoader::ReadGeometryPrime()
@@ -116,39 +118,57 @@ void CAreaLoader::ReadGeometryPrime()
 
 void CAreaLoader::ReadSCLYPrime()
 {
+    // Prime, Echoes Demo
     Log::FileWrite(mpMREA->GetSourceString(), "Reading MREA script layers (MP1)");
     mpSectionMgr->ToSection(mScriptLayerBlockNum);
 
     CFourCC SCLY(*mpMREA);
     if (SCLY != "SCLY")
     {
-        Log::Error(mpMREA->GetSourceString() + " - Invalid SCLY magic: " + SCLY.ToString());
+        Log::FileError(mpMREA->GetSourceString(), mpMREA->Tell() - 4, "Invalid SCLY magic: " + SCLY.ToString());
         return;
     }
+    mpMREA->Seek(0x4, SEEK_CUR); // Skipping unknown value which is always 4
 
-    if (mVersion <= ePrime)
-        mpMREA->Seek(0x4, SEEK_CUR);
-    else
-        mpMREA->Seek(0x1, SEEK_CUR);
-
+    // Read layer sizes
     mNumLayers = mpMREA->ReadLong();
-    mpArea->mScriptLayers.reserve(mNumLayers);
-
+    mpArea->mScriptLayers.resize(mNumLayers);
     std::vector<u32> LayerSizes(mNumLayers);
-    for (u32 iLayer = 0; iLayer < mNumLayers; iLayer++)
-        LayerSizes[iLayer] = mpMREA->ReadLong();
 
-    for (u32 iLayer = 0; iLayer < mNumLayers; iLayer++)
+    for (u32 iLyr = 0; iLyr < mNumLayers; iLyr++)
+        LayerSizes[iLyr] = mpMREA->ReadLong();
+
+    // SCLY
+    for (u32 iLyr = 0; iLyr < mNumLayers; iLyr++)
     {
-        u32 Next = mpMREA->Tell() + LayerSizes[iLayer];
-
-        CScriptLayer *pLayer = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
-        if (pLayer)
-            mpArea->mScriptLayers.push_back(pLayer);
-
+        u32 Next = mpMREA->Tell() + LayerSizes[iLyr];
+        mpArea->mScriptLayers[iLyr] = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
         mpMREA->Seek(Next, SEEK_SET);
     }
 
+    // SCGN
+    if (mVersion == eEchoesDemo)
+    {
+        mpSectionMgr->ToSection(mScriptGeneratorBlockNum);
+
+        CFourCC SCGN(*mpMREA);
+        if (SCGN != "SCGN")
+            Log::FileError(mpMREA->GetSourceString(), mpMREA->Tell() - 4, "Invalid SCGN magic: " + SCGN.ToString());
+
+        else
+        {
+            mpMREA->Seek(0x1, SEEK_CUR);
+            CScriptLayer *pLayer = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
+
+            if (pLayer)
+            {
+                mpArea->mpGeneratorLayer = pLayer;
+                pLayer->SetName("Generated Objects");
+                pLayer->SetActive(true);
+            }
+        }
+    }
+
     SetUpObjects();
 }
 
@@ -270,30 +290,49 @@ void CAreaLoader::ReadHeaderEchoes()
 
     mpSectionMgr->Init();
     LoadSectionDataBuffers();
+
+    mpArea->mOriginalWorldMeshCount = mNumMeshes;
 }
 
 void CAreaLoader::ReadSCLYEchoes()
 {
+    // MP2, MP3 Proto, MP3, DKCR
     Log::FileWrite(mpMREA->GetSourceString(), "Reading MREA script layers (MP2/MP3/DKCR)");
     mpSectionMgr->ToSection(mScriptLayerBlockNum);
+    mpArea->mScriptLayers.resize(mNumLayers);
 
     // SCLY
-    for (u32 l = 0; l < mNumLayers; l++)
+    for (u32 iLyr = 0; iLyr < mNumLayers; iLyr++)
     {
-        CScriptLayer *pLayer = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
-
-        if (pLayer)
-            mpArea->mScriptLayers.push_back(pLayer);
+        CFourCC SCLY(*mpMREA);
+        if (SCLY != "SCLY")
+        {
+            Log::FileError(mpMREA->GetSourceString(), mpMREA->Tell() - 4, "Layer " + TString::FromInt32(iLyr, 0, 10) + " - Invalid SCLY magic: " + SCLY.ToString());
+            mpSectionMgr->ToNextSection();
+            continue;
+        }
 
+        mpMREA->Seek(0x5, SEEK_CUR); // Skipping unknown + layer index
+        mpArea->mScriptLayers[iLyr] = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
         mpSectionMgr->ToNextSection();
     }
 
     // SCGN
-    mpSectionMgr->ToSection(mScriptGeneratorBlockNum);
-    CScriptLayer *pLayer = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
+    CFourCC SCGN(*mpMREA);
+    if (SCGN != "SCGN")
+    {
+        Log::FileError(mpMREA->GetSourceString(), mpMREA->Tell() - 4, "Invalid SCGN magic: " + SCGN.ToString());
+        return;
+    }
 
-    if (pLayer)
-        mpArea->mpGeneratorLayer = pLayer;
+    mpMREA->Seek(0x1, SEEK_CUR); // Skipping unknown
+    mpArea->mpGeneratorLayer = CScriptLoader::LoadLayer(*mpMREA, mpArea, mVersion);
+
+    if (mpArea->mpGeneratorLayer)
+    {
+        mpArea->mpGeneratorLayer->SetName("Generated Objects");
+        mpArea->mpGeneratorLayer->SetActive(true);
+    }
 
     SetUpObjects();
 }
@@ -334,12 +373,19 @@ void CAreaLoader::ReadHeaderCorruption()
         else if (Type == "SOBJ") mScriptLayerBlockNum = Num;
         else if (Type == "SGEN") mScriptGeneratorBlockNum = Num;
         else if (Type == "WOBJ") mGeometryBlockNum = Num; // note WOBJ can show up multiple times, but is always 0
+
+        CGameArea::SSectionNumber SecNum;
+        SecNum.SectionID = Type;
+        SecNum.Index = Num;
+        mpArea->mSectionNumbers.push_back(SecNum);
     }
 
     mpMREA->SeekToBoundary(32);
     Decompress();
     mpSectionMgr->Init();
     LoadSectionDataBuffers();
+
+    mpArea->mOriginalWorldMeshCount = mNumMeshes;
 }
 
 void CAreaLoader::ReadGeometryCorruption()
@@ -478,6 +524,8 @@ void CAreaLoader::ReadCompressedBlocks()
         mClusters[c].CompressedSize = mpMREA->ReadLong();
         mClusters[c].NumSections = mpMREA->ReadLong();
         mTotalDecmpSize += mClusters[c].DecompressedSize;
+
+        if (mClusters[c].CompressedSize != 0) mpArea->mUsesCompression = true;
     }
 
     mpMREA->SeekToBoundary(32);
diff --git a/src/Core/Resource/Factory/CScriptLoader.cpp b/src/Core/Resource/Factory/CScriptLoader.cpp
index 5abb60c7..d23e16aa 100644
--- a/src/Core/Resource/Factory/CScriptLoader.cpp
+++ b/src/Core/Resource/Factory/CScriptLoader.cpp
@@ -367,32 +367,7 @@ CScriptObject* CScriptLoader::LoadObjectMP2(IInputStream& SCLY)
 
 CScriptLayer* CScriptLoader::LoadLayerMP2(IInputStream& SCLY)
 {
-    bool IsSCGN = false;
-
-    if (mVersion >= eEchoes)
-    {
-        CFourCC SCLY_Magic(SCLY);
-
-        if (SCLY_Magic == "SCLY")
-        {
-            SCLY.Seek(0x6, SEEK_CUR);
-        }
-        else if (SCLY_Magic == "SCGN")
-        {
-            SCLY.Seek(0x2, SEEK_CUR);
-            IsSCGN = true;
-        }
-        else
-        {
-            Log::FileError(SCLY.GetSourceString(), SCLY.Tell() - 4, "Invalid script layer magic: " + TString::HexString((u32) SCLY_Magic.ToLong()));
-            return nullptr;
-        }
-    }
-    else
-    {
-        SCLY.Seek(0x1, SEEK_CUR);
-    }
-
+    SCLY.Seek(0x1, SEEK_CUR); // Skipping version. todo: verify this?
     u32 NumObjects = SCLY.ReadLong();
 
     mpLayer = new CScriptLayer();
@@ -405,11 +380,6 @@ CScriptLayer* CScriptLoader::LoadLayerMP2(IInputStream& SCLY)
             mpLayer->AddInstance(pObj);
     }
 
-    if (IsSCGN)
-    {
-        mpLayer->SetName("Generated");
-        mpLayer->SetActive(true);
-    }
     return mpLayer;
 }
 
diff --git a/src/Core/Resource/Script/IProperty.h b/src/Core/Resource/Script/IProperty.h
index 1eceab16..f8b39d7f 100644
--- a/src/Core/Resource/Script/IProperty.h
+++ b/src/Core/Resource/Script/IProperty.h
@@ -160,7 +160,7 @@ public:
     TMayaSplineProperty(IPropertyTemplate *pTemp, CPropertyStruct *pParent, const std::vector<u8>& v)
         : TTypedProperty(pTemp, pParent, v) {}
 
-    virtual bool MatchesDefault() { return true; }
+    virtual bool MatchesDefault() { return Get().empty(); }
 };
 
 /*
diff --git a/src/Editor/PropertyEdit/CPropertyDelegate.cpp b/src/Editor/PropertyEdit/CPropertyDelegate.cpp
index 5acecdf7..2013c766 100644
--- a/src/Editor/PropertyEdit/CPropertyDelegate.cpp
+++ b/src/Editor/PropertyEdit/CPropertyDelegate.cpp
@@ -608,7 +608,7 @@ void CPropertyDelegate::SetCharacterEditorData(QWidget *pEditor, const QModelInd
 
     if (Type == eFileProperty)
     {
-            static_cast<WResourceSelector*>(pEditor)->SetResource(Params.AnimSet());
+        static_cast<WResourceSelector*>(pEditor)->SetResource(Params.AnimSet());
     }
 
     else if (Type == eEnumProperty)
@@ -632,10 +632,10 @@ void CPropertyDelegate::SetCharacterModelData(QWidget *pEditor, const QModelInde
 
     if (Type == eFileProperty)
     {
-        Params.SetResource( static_cast<WResourceSelector*>(pEditor)->GetResource() );
+        Params.SetResource( static_cast<WResourceSelector*>(pEditor)->GetResourceInfo() );
         // Reset all other parameters to 0
         Params.SetNodeIndex(0);
-        for (u32 iUnk = 0; iUnk < 4; iUnk++)
+        for (u32 iUnk = 0; iUnk < 3; iUnk++)
             Params.SetUnknown(iUnk, 0);
     }
 
@@ -677,7 +677,7 @@ EPropertyType CPropertyDelegate::DetermineCharacterPropType(EGame Game, const QM
     else
     {
         if      (rkIndex.row() == 0) return eFileProperty;
-        else if (rkIndex.row() <= 3) return eLongProperty;
+        else if (rkIndex.row() <= 2) return eLongProperty;
     }
     return eUnknownProperty;
 }
diff --git a/src/Editor/PropertyEdit/CPropertyModel.cpp b/src/Editor/PropertyEdit/CPropertyModel.cpp
index c3a89e90..1917fc93 100644
--- a/src/Editor/PropertyEdit/CPropertyModel.cpp
+++ b/src/Editor/PropertyEdit/CPropertyModel.cpp
@@ -113,7 +113,7 @@ int CPropertyModel::rowCount(const QModelIndex& rkParent) const
         CAnimationParameters Params = static_cast<TCharacterProperty*>(pProp)->Get();
         if (Params.Version() <= eEchoes) return 3;
         if (Params.Version() <= eCorruption) return 2;
-        return 5;
+        return 4;
     }
 
     default:
@@ -241,7 +241,8 @@ QVariant CPropertyModel::data(const QModelIndex& rkIndex, int Role) const
                     if (rkIndex.column() == 0)
                     {
                         if (rkIndex.row() == 0) return "Character";
-                        else return "Unknown " + QString::number(rkIndex.row());
+                        else if (rkIndex.row() == 1) return "Default Anim";
+                        else return "Unknown " + QString::number(rkIndex.row() - 1);
                     }
 
                     if (rkIndex.column() == 1 && rkIndex.row() > 0)
diff --git a/src/Editor/Widgets/WAnimParamsEditor.cpp b/src/Editor/Widgets/WAnimParamsEditor.cpp
index 2bf74f6c..7f8c88ad 100644
--- a/src/Editor/Widgets/WAnimParamsEditor.cpp
+++ b/src/Editor/Widgets/WAnimParamsEditor.cpp
@@ -2,6 +2,7 @@
 #include "Editor/UICommon.h"
 #include <Core/Resource/CAnimSet.h>
 #include <Core/Resource/CResCache.h>
+#include <Core/Resource/CResourceInfo.h>
 
 WAnimParamsEditor::WAnimParamsEditor(QWidget *pParent)
     : QWidget(pParent),
@@ -66,10 +67,10 @@ void WAnimParamsEditor::SetParameters(const CAnimationParameters& params)
 // ************ PRIVATE SLOTS ************
 void WAnimParamsEditor::OnResourceChanged(QString path)
 {
-    CResource *pRes = gResCache.GetResource(path.toStdString());
-    if (pRes && pRes->Type() != eAnimSet) pRes = nullptr;
+    CResourceInfo ResInfo(path.toStdString());
+    if (ResInfo.Type() != "ANCS" && ResInfo.Type() != "CHAR") ResInfo = CResourceInfo();
 
-    mParams.SetResource(pRes);
+    mParams.SetResource(ResInfo);
     emit ParametersChanged(mParams);
 }
 
@@ -217,7 +218,7 @@ void WAnimParamsEditor::SetupUI()
         connect(mpSpinBoxes[0], SIGNAL(valueChanged(int)), this, SLOT(OnUnknownChanged()));
 
         // Create unknown spin box B/C/D
-        for (u32 iBox = 1; iBox < 4; iBox++)
+        for (u32 iBox = 1; iBox < 3; iBox++)
         {
             mpSpinBoxes[iBox] = new WIntegralSpinBox(this);
             mpSpinBoxes[iBox]->setRange(INT32_MIN, INT32_MAX);