Unreal Engine Issues

Texture Sample 2D Parameter not Working with WPO on Mobile Quality ES3.1

WPO does not accept TextureParameter2D nodes when deployed to High End Mobile. The interesting thing is that all other inputs accept Param2D, so it is not entirely clear why WPO is not working. If ...

Wrong LOD Selected on Skeletal Mesh with Active Scene Capture

Skeletal Meshes with LODs are not able to change LOD levels when a SceneCapture Actor is present. The LOD selected for the Render Target of the Scene Capture is used also for the main viewport. This ...

Composite Textures Normal to Roughness Alpha doesn't generate valid data

BSP Converted to Static Mesh with Multiple Materials Will Only Show Element 0 After Migrating and Changing LOD Settings

Postprocess volume priority bug

ActorPositionWS Material BP node can crash when used in Post Process material

The ActorPositionWS BP node calls GetActorWorldPosition() in HLSL which references Primitive.ActorWorldPosition. But GetActorWorldPosition() is not protected by an #if HAS_PRIMITIVE_UNIFORM_BUFFER ...

Material Parameter Collection does not correctly render in Widget BP

If a Material Parameter Collection with a Scalar Parameter is used within a material and that material is called within a widget the scalar parameter will render with a 0 value, even when set to ano ...

Light Shaft Occlusion causes exponential height fog to render incorrectly in stereoscopic

Enabling Light Shaft Occlusion causes exponential height fog to render incorrectly at certain viewing angles in stereoscopic. This does not reproduce once light shaft occlusion is turned off on the ...

Default Values of Parameters from Material Function not saving in Material Instances

A Parameter set in a Material Function cannot be reset to a default value in a Material Instance. Reproduced in 4.7p7 CL-2440994 and Main Promotable-CL-2444381 ...

Set Material for Particle System via Construction Script in Blueprints is Different is PIE versus Standalone

Differences in PIE and Standalone when attempting to set the Material for a Particle system within the construction script of an actor blueprint. I know there are probably some differences in how P ...