Unreal Engine Issues

Multiple setter functions in UMaterialEditingLibrary always return false even when the parameter is correctly set on the MaterialInstance.

In Unreal Engine, materials can expose parameters that can then be modified via instances (MaterialInstanceConstant). The UMaterialEditingLibrary provides several functions to modify these parameter ...

Specular highlight and roughness issue on clearcoat material with second normal at certain view angles

Specular highlights on non-Nanite meshes with a clearcoat material that has the second normal enabled will disappear at certain view angles. This can be worked around by adding a constant node to th ...

Mesh with material where the translucency pass is set to Before DOF are not render correctly if r.SeparateTranslucencyScreenPercentage is set to a value != 100

[CrashReport][Crash] UnrealEditor-Core!IMemoryReadStream::CopyTo()

Intermittent crash in virtual texture transcode. Usually mempy from nullptr but also occasionally we see the same callstack with memcpy to random location. ...

WPO bug with Material Layers

I find that there are a couple of things that influence the artefact If WPO in M_BlendingBug is connected I get an issue with the blending. Removing the opacity input that's passed through the ma ...

Return FGoogleARCoreXRTrackingSystem::OnGetARTexture with YCbCr colour conversion

Either directly return the converted image (if we need it everywhere), or, convert it in ARUtilities/Materials/M_ScreenSpacePassthroughCamera ...

Masked material using virtual textures covering a decal will result in black pixels

Depth Passes for Masked Materials using Virtual Textures does not work correctly when it is in front of a Nanite Mesh and a Decal, resulting in black artifacts. Also tested on //UE5/Main, CL: 41024 ...

Reflection capture doesn't work when using Lumen GI and SSR

Reflection Capture does not appear to work with Lumen + SSR. Licensees have reported that there are cases where they want to combine Lumen GI, SSR and Reflection capture for quality and performance ...

Shadow artifacts on translucent objects when using the setting Cast Dynamic Shadows As Masked

Flickering shadow artifacts can be seen with translucent mateirals with "Cast Dynamic Shadows As Masked" enabled. Please note that the artifacts disappear when switching from virtual shadow maps to ...

World Position is incorrect when used to control the opacity mask in a nanite spline mesh

When calculating the opacity mask, Nanite spline meshes do not have the correct World Position in the Material. This leads to visual artifacts when the mask relies on the world position. ...