Unreal Engine Issues

Editor crashes when overriding Texture Collection in Material Instance

When a Material uses the DefaultTextureCollection and a Material Instance overrides it - or vice versa - the Editor will crash. Note: bindlessconfiguration=Minimal or higher must be enabled to use ...

Virtual Texture Collection doesn't show correct mip level

Textures from VirtualTextureCollections appear blurry because the correct mip level isn’t shown unless FVirtualTextureCollectionResource::InitRHI is modified in VirtualTextureCollection.cpp withProd ...

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 ...

Possible shader preload deadlock when using Zen streaming

The deadlock happens when enough shader preload are launch in parallel on a slower IO backend (like zen). When that happens, the preload starts a waiting period that never ends because it cannot be ...

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 ...