Unreal Engine Issues

Light Function and World Position in 5.4

When rendering a Light Function into the Translucency Lighting Volume, the World Position Material Expression returns the position relative to the Camera (unrotated), not the World. This can be mor ...

Hair Material's Tangents input has no effect in PathTracing

Expectation: Tangent should work on Hair Material ...

Build lighting for single stationally light level generates a shadow map in PF_B8G8R8A8 format

Texture format override to BGRA8 due to changes in CL-30603716. The following code can restore the previous behavior. void FShadowMapPendingTexture::StartEncoding(ULevel* LightingScenario, ITexture ...

Null Material Layers in Material Instances cause Opacity Mask and WPO to break on Nanite Meshes

When a Material Instance is loaded that has a nullptr layer in StaticParametrs.Materiallayers.  The Material Instance will create it's own CachedExpressionData but the ConnectedParameterMask will be ...

Additive Niagara Sprites are rendered with offset in right eye

Static/stationary child actor components are invisible and/or move position when placed inside a dynamically loaded level

When loading a non-world partitioned level into a persistent world partitioned level, parent actors with child actor components within the loaded map will move position or become invisible. Within t ...

Reduce the overhead of World Partition cells UObjects on GC

Users with large numbers of UObjects (500k+) that are using World Partition want to enable GC actor clustering to handle streaming levels but no performance gains are realized when enabling GC clust ...

Mobile Depth of Field blurry eveywhere

user reports I investigated the problem throught the frame capture tools and found that on a real device (iPhone 15 Pro in my case), the depth texture for the SunMask pass is not set (a dummy black ...

Invalid access location compressing a BC6h texture in the editor

Large texture crashes during Oodle compression with "-stompmalloc". It appears to be an internal Oodle error. Also tested on //UE5/Release-5.5/, CL: 37463908 ...

Depth of Field blur is inconsistent with r.ScreenPercentage == 100 (Dynamic resolution)

Depth of Field, with "r.DOF.Recombine.Quality = 0" will adjust the size of the depth in focus based on screen percentage. This might be related to over-fitting from the tile classification, because ...