diff --git a/Editor/ViewManager.cpp b/Editor/ViewManager.cpp
index 65f34ac04..6884317a4 100644
--- a/Editor/ViewManager.cpp
+++ b/Editor/ViewManager.cpp
@@ -90,8 +90,8 @@ void ViewManager::ParticleView::draw(boo::IGraphicsCommandQueue *gfxQ)
         m_vm.m_modelTest->GetInstance().ActivateLights(lights);
         m_vm.m_modelTest->Draw(flags);
 
-        zeus::CColor ctrlCol{1.f, 0.f, 0.f, 1.f};
-        float fac = 0.5f;
+        zeus::CColor ctrlCol{0.7f, 0.f, 0.3f, 1.f};
+        float fac = 0.0f;
         zeus::CColor a = zeus::CColor::lerp(ctrlCol, zeus::CColor::skWhite, fac);
         m_thermColdFilter.setColorA(a);
         float bFac = 0.f;
@@ -104,7 +104,7 @@ void ViewManager::ParticleView::draw(boo::IGraphicsCommandQueue *gfxQ)
         zeus::CColor b{bFac, bFac, bFac, bAlpha};
         m_thermColdFilter.setColorB(b);
         zeus::CColor c = zeus::CColor::lerp(zeus::CColor::skBlack, zeus::CColor::skWhite, fac * 0.75f + 0.25f);
-        m_thermColdFilter.setColorC(c);
+        m_thermColdFilter.setColorC(zeus::CColor::skBlack);
 
         m_thermColdFilter.setScale(std::sin(m_theta) * 0.5f + 0.5f);
 
diff --git a/Runtime/Graphics/Shaders/CThermalColdFilterGLSL.cpp b/Runtime/Graphics/Shaders/CThermalColdFilterGLSL.cpp
index 1dfa3dff1..3bffbcc0f 100644
--- a/Runtime/Graphics/Shaders/CThermalColdFilterGLSL.cpp
+++ b/Runtime/Graphics/Shaders/CThermalColdFilterGLSL.cpp
@@ -40,7 +40,7 @@ BOO_GLSL_BINDING_HEAD
 "    vtf.sceneUv = uvIn.xy;\n"
 "    vtf.shiftUv = (mat3(shiftMtx) * uvIn.xyz).xy;\n"
 "    vtf.shiftScale = shiftScale.xy;\n"
-"    gl_Position = FLIPFROMGL(vec4(posIn.xyz, 1.0));\n"
+"    gl_Position = vec4(posIn.xyz, 1.0);\n"
 "}\n";
 
 static const char* FS =
diff --git a/hecl b/hecl
index 1c4de40f6..ba0684b91 160000
--- a/hecl
+++ b/hecl
@@ -1 +1 @@
-Subproject commit 1c4de40f6053ff71c5c40fbfeb6a656ac3949365
+Subproject commit ba0684b9153beb9d098a87b048ec642f289b0ed5