Unreal Engine Issues

Material Instance used textures list shows sample textures used as Input Preview Textures within Material Functions

Multiple water body blend modes produce unexpected results

LandscapeExportWeightmapToRenderTarget not implemented

LandscapeExportWeightmapToRenderTarget is not implemented:bool ALandscapeProxy::LandscapeExportWeightmapToRenderTarget(UTextureRenderTarget2D* InRenderTarget, FName InLayerName) { returnfalse; } ...

[AI] Debug Render Scene Proxy hits ensure for registering a delegate twice during level streaming.

Description from licensee: We're seeing an ensure get tripped up in FDebugRenderSceneProxy that says "DrawDelegate is already Registered!". Debugging the issue, we have confirmed that the DrawDeleg ...

FBX animations generated under fractional framerates fail to import

We now have the following error that is generated in FFbxImporter::ValidateAnimStackif (!FMath::IsNearlyZero(SubFrame, KINDA_SMALL_NUMBER) && !FMath::IsNearlyEqual(SubFrame, 1.0f, KINDA_SMALL_NUMBER ...

Physical Material Masks do not work in non-editor builds

Physical material masks are not working as expected in cooked builds. Licensee reports that the mask data is empty at runtime. ...

Editor-only blueprints like WidgetBlueprint are not added to cooked asset registry class hierarchy

Both the Asset Registry and Asset Manager look for all subclasses of UBlueprintCore and use that to search for blueprint classes and construct an inheritance hierarchy. This always works in editor b ...

Lumen generates gradated shading even if the light is a constant color sky light

Lumen generates a gradated shading even if objects are lit by a 360-degree constant sky light.[Link Removed][Link Removed] I looked into this and found that this comes from Spherical Harmonics int ...

FPlatformMisc::RequestExit freezes app in IOS

See the UDN question (duplicated below). I think we need to better manage the lifetime of the event we use for synchronization here. We are experiencing an issue where when FPlatformMisc::Request ...

Runtime Virtual Texture samples at low precision for very large volumes

When using a runtime virtual texture with a resolution of greater than 2^24 we can start to see a lack of precision in sampling when the sampling UVs get closer to 1. To see this we need to be usin ...