Unreal Engine Issues

Crash when using ListStreamingTextures with VirtualTexturePrefetchMips

The ListStreamingTextures command causes a crash in FRenderAssetStreamingManager::HandleListStreamingRenderAssetsCommand when there is a virtual texture that uses crashes when encountering one of t ...

Nanite: unused VertexInterpolator node disables Opacity Mask (material renders opaque)

On Nanite meshes, placing a VertexInterpolator node in a material graph without using it (unconnected, or routed through a disabled static switch) silently breaks the Opacity Mask and the material r ...

Crash with SceneCapture DepthPrepassOptimization enabled

Dynamic Translucency Resolution Not Reported Correctly

The dynamic translucency resolution and other dynamic resolution values were tied to the primary dynamic resolution and never updated for each type of dynamic resolution. The scaling resolution fra ...

Virtual Texture does not stream high-resolution data when assigned as a UI material to a widget.

When a Virtual Texture is applied as a UI material, there is no associated geometry, so it does not explicitly request the loading of high-res virtual texture tiles. ...

SetBlendState has HDR UI override baked in

SetBlendState() is called from non-UI code but has HDR UI overrides baked in. The UI specific code should be moved to the UI code that calls SetBlendState() - likely in FCanvas, or the function sho ...

DynamicWind doesn't unregister proxy and leaks

FSkinnedSceneProxy's never get unregistered from the DynamicWind system In FDynamicWindTransformProvider::UnregisterSceneProxy, there's an early out that says: if (SkinningSceneExtProxy == nullptr ...

Occlusion Queries for Static Meshes with ERuntimeVirtualTextureMainPassType::Exclusive

Static Meshes that draw into RVTs and have "Draw In Main Pass" is set to "From Virtual Texture" (ERuntimeVirtualTextureMainPassType::Exclusive) will still draw in Occlusion Queries. This can be tr ...

Unstable automation tests in "Standard Tests" list.

The two following automation tests found in the "Standard Tests" list hit exceptions & cause the editor to crash:System->Physics->Interface->BodyInstanceShaders->ShaderPreprocessor->BuiltInMacros ...

HISM causing massive spikes in BuildTreeAsync

Loading a world partition cell containing dense foliage (30k+ instances per cell) causes spikes on lower end hardware of up to 10-15ms and can observe spikes of 2-5ms on high end hardware too primar ...