Unreal Engine Issues

When the value of the TMap variable of the child blueprint is changed and compiled, it will restore to the default value of the parent blueprint.

For TMap variables of type struct created in blueprint, if change the default value in child blueprint and compile, it will restore to the default value of the parent actor. This problem does not o ...

Strange Artifact under SingleLayerWater with dynamic directional light and LightPropagationVolumes

upd. Regression was checked on //UE4/Release-4.26 CL 15973114, the issue was reproduced. Regression - No [Image Removed] ...

DistanceFieldBentNormalAO does not appear to work with imposter UVs

I have not entirely ruled out any issues with the imposter material in the repro, there's a chance this is related to the normal rotations, but turning off distancefields entirely does fix the issue ...

RGB/UINT10 HDR Format not using ST.2084

Specification here: [Link Removed] Which is mirrored in engine in FD3D12DynamicRHI::Init (for example): [Image Removed] However, FWindowsPlatformMisc::ChooseHDRDeviceAndColorGamut always returns ...

Pixelated volumetric translucent shadows

I narrowed down the issue to the Main call of ShadowProjectionPixelShader, and tested (on 4.26 and 4.27) a combo of different material and light shadow settings, as well as enabling transmission on ...

Vertex Interpolators broken in landscape materials

D:/Unreal/UE4_Release-4.27/Engine/Shaders/Private/LandscapeVertexFactory.ush(788,3-59): Shader FDebugViewModeVS, Permutation 0, VF FLandscapeVertexFactory[Image Removed]:/Unreal/UE4_Release-4.27/Eng ...

Changes to Material Instance Parent don't appear to propagate to child instances if the child instance's editor window is open

It looks like this occurs when the grandchild instance window is open. If you close and reopen the Grandchild's window the parameter appears as expected. I've attached a project with the setup step ...

GPU lightmass not baking directional light with sub levels and VTs off

DebugDrawHelper memory leak in editor

Refraction broken when using material function

Licensee has provided a BP workaround ...