diff --git a/hecl/blender/hecl/hmdl/__init__.py b/hecl/blender/hecl/hmdl/__init__.py
index 4339d07ac..b31fa83e1 100644
--- a/hecl/blender/hecl/hmdl/__init__.py
+++ b/hecl/blender/hecl/hmdl/__init__.py
@@ -286,11 +286,11 @@ def cookcol(writebuf, mesh_obj):
         surfaceWeb = prop_val_from_colmat('retro_surface_web', m)
         projPassthrough = prop_val_from_colmat('retro_projectile_passthrough', m)
         solid = prop_val_from_colmat('retro_solid', m)
-        u20 = prop_val_from_colmat('retro_u20', m)
+        noPlatformCollision = prop_val_from_colmat('retro_no_platform_collision', m)
         camPassthrough = prop_val_from_colmat('retro_camera_passthrough', m)
         surfaceWood = prop_val_from_colmat('retro_surface_wood', m)
         surfaceOrganic = prop_val_from_colmat('retro_surface_organic', m)
-        u24 = prop_val_from_colmat('retro_u24', m)
+        noEdgeCollision = prop_val_from_colmat('retro_no_edge_collision', m)
         surfaceRubber = prop_val_from_colmat('retro_surface_rubber', m)
         seeThrough = prop_val_from_colmat('retro_see_through', m)
         scanPassthrough = prop_val_from_colmat('retro_scan_passthrough', m)
@@ -307,8 +307,9 @@ def cookcol(writebuf, mesh_obj):
                  surfaceIce, pillar, surfaceMetalGrating, surfacePhazon, surfaceDirt, surfaceLava, surfaceSPMetal,
                  surfaceStoneRock, surfaceSnow, surfaceMudSlow, surfaceFabric, halfPipe, surfaceMud, surfaceGlass,
                  unused3, unused4, surfaceShield, surfaceSand, surfaceMothOrSeedOrganics, surfaceWeb, projPassthrough,
-                 solid, u20, camPassthrough, surfaceWood, surfaceOrganic, u24, surfaceRubber, seeThrough, scanPassthrough,
-                 aiPassthrough, ceiling, wall, floor, aiBlock, jumpNotAllowed, spiderBall, screwAttackWallJump))
+                 solid, noPlatformCollision, camPassthrough, surfaceWood, surfaceOrganic, noEdgeCollision, surfaceRubber,
+                 seeThrough, scanPassthrough, aiPassthrough, ceiling, wall, floor, aiBlock, jumpNotAllowed, spiderBall,
+                 screwAttackWallJump))
 
     # Send verts
     writebuf(struct.pack('I', len(copy_mesh.vertices)))
diff --git a/hecl/include/hecl/Blender/Connection.hpp b/hecl/include/hecl/Blender/Connection.hpp
index 23f1417af..370ae0ac2 100644
--- a/hecl/include/hecl/Blender/Connection.hpp
+++ b/hecl/include/hecl/Blender/Connection.hpp
@@ -304,11 +304,11 @@ struct ColMesh
         bool surfaceWeb;
         bool projPassthrough;
         bool solid;
-        bool u20;
+        bool noPlatformCollision;
         bool camPassthrough;
         bool surfaceWood;
         bool surfaceOrganic;
-        bool u24;
+        bool noEdgeCollision;
         bool surfaceRubber;
         bool seeThrough;
         bool scanPassthrough;
diff --git a/hecl/lib/Blender/Connection.cpp b/hecl/lib/Blender/Connection.cpp
index aca93bd60..a997a2fd0 100644
--- a/hecl/lib/Blender/Connection.cpp
+++ b/hecl/lib/Blender/Connection.cpp
@@ -150,7 +150,7 @@ uint32_t Connection::_readStr(char* buf, uint32_t bufSz)
         BlenderLog.report(logvisor::Fatal, strerror(errno));
         return 0;
     }
-    else if (readLen >= 4)
+    else if (readLen >= 9)
     {
         if (!memcmp(buf, "EXCEPTION", std::min(readLen, uint32_t(9))))
         {
@@ -187,7 +187,7 @@ size_t Connection::_readBuf(void* buf, size_t len)
         int ret = Read(m_readpipe[0], cBuf, len);
         if (ret < 0)
             goto err;
-        if (len >= 4)
+        if (len >= 9)
             if (!memcmp((char*) cBuf, "EXCEPTION", std::min(len, size_t(9))))
                 _blenderDied();
         readLen += ret;
@@ -1338,6 +1338,7 @@ ColMesh::ColMesh(Connection& conn)
     for (uint32_t i=0 ; i<count ; ++i)
         edges.emplace_back(conn);
 
+
     conn._readBuf(&count, 4);
     trianges.reserve(count);
     for (uint32_t i=0 ; i<count ; ++i)