Unreal Engine Issues

When the Transform of InstancedStaticMesh is updated, the Random Seed value of PerInstanceRandom is updated.

When updating Transform of InstancedStaticMesh by UpdateInstanceTransform, PerInstanceRandom used in Material is updated. With 4.16 does not update the RandomSeed value. ...

Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled

Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled.  Working as expected in 4.22 CL# 7053642 Found in 4.23 Preview 2 CL# 7321677 and 4.24 CL# 7437539 This is a regression   ...

EPixelFormat::PF_R16_SINT does not render correctly for textures

Creating a UTexture2D the following way does not properly process gradients in the texture: ------ bool Atexture_test_actor::LoadRawFileTest( /* output */ UTexture2D*& image) { TArray<short> v ...

Crash compiling System when a Dynamic Input only outputs a numeric value

Crash compiling System when a Dynamic Input only outputs a numeric value Crash occurs using Scratchpad and a Dynamic Input Script asset.  The crash does not occur if I connect a parameter to the s ...

VectorNoise Material Expression Position's tooltip says it accepts 2 or 3 dimensional vectors, but the node raises an error if a Float2 is input

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LI Property Override: LI internal references are broken when saving the overrides.

When Saving the level, ULevelInstancePropertyOverrideAsset::SerializeActorPropertyOverrides will run UStruct::SerializeTaggedProperties to "diff-serialize" each object against its archetype (the LI ...

Sorting Issue With Many Overlapping GPU Paricles

GPU particles have a strange sorting priority once a significant amount of overlap starts happening. Changing the sort mode doesn't influence this effect at all. While on CPU particles changing the ...

Skeletal meshes with recently generated LODs will not change LODs in viewport

REGRESSION No Skeletal meshes that have recently had LODs auto-generated in the editor will not change LOD levels in the level viewport. This only occurs when the user is NOT playing or simulating ...

Display states from Solidworks assemblies are not correctly imported

FCanvasTriangleRendererItem relies on BaseVertexIndex not being zero.

The root of this issue is that FLocalVertexFactory is doing manual vertex fetch in the shader. In HLSL, this relies on SV_VertexId. In GLSL, it's gl_VertexId. HLSL does not include the base vertex i ...