Unreal Engine Issues
Unreal Engine Issues
Cannot get Texture Size property from Texture Collections
UE - Rendering - Architecture - Materials - Aug 26, 2026The following error is shown when attempting to use the Texture Size of a Texture Collection texture object: Texture size only available for Texture2D, TextureVirtual, Texture2DArray, VolumeTexture ...
HasVertexPositionOffsetConnected returns true even if WorldPosition output isn't connect to output
UE - Rendering - Architecture - Materials - Aug 25, 2026FMaterialCachedExpressionData::UpdateForExpressions iterates on all expressions, even for those that are not enabled in a material instance or not even connected to output. This will enable features ...
Parameter metadata not accessible if modified in Material Instance and then converted to CustomPrimitiveData
UE - Rendering - Architecture - Materials - Jun 24, 2026There’s a potential issue with some changes we made to UMaterialInstance::GetParameterValue (https://github.com/EpicGames/UnrealEngine/commit/8f2bebb008ba645f5938da844cd46b0925322b13). It seems as t ...
Custom expression additional outputs don't work when connected to World Position Offset
UE - Rendering - Architecture - Materials - Jun 24, 2026Custom expression additional outputs are considered (0,0,0) when connected to WPO. ...
Apply mesh paint Blueprint instance changes and save fails
UE - Rendering - Architecture - Materials - Jun 22, 2026After mesh painting on a BP Static Mesh Actor, and "Apply instance changes to Blueprint" the added virtual texture is removed with the log:LogTexture: Display: Building texture TwoD: /Game/FirstPers ...
Crash when applying Decal material with Distance Cull Fade node to Decal Actor
UE - Rendering - Architecture - Materials - Jun 15, 2026The Editor crashes when applying a Material with a Distance Cull Fade node to a Decal Actor. Fatal error: [Link Removed] [Line: 730] Missing uniform buffer at slot 2, stage SF_Pixel. Please check ...
Material Layers cannot be re-ordered by dragging in the Material Layer Parameters tab
UE - Rendering - Architecture - Materials - Jun 9, 2026Material Layers cannot be re-ordered by dragging in the Material Layer Parameters tab even though there is UI for dragging the rows and the rows appear to be draggable. ...
Editor crashes when Material Layer visibility is toggled after removing a Material Layer in Parent
UE - Rendering - Architecture - Materials - Jun 9, 2026When a Material Layer is removed from a Parent Material, the Parent Material updates correctly in the viewport, but any Child Material Instance do not update correctly in the viewport until the Chil ...
Adding/Removing a Material Layer on a Parent Material doesn't propagate to Children correctly
UE - Rendering - Architecture - Materials - Jun 9, 2026When a Material Layer is added to or removed from a Parent Material the layer changes don’t automatically propagate to Child Materials correctly even if the Parent Material is saved. The Child mate ...
Toggling Material Layer visibility in Parent Material doesn't propagate to children
UE - Rendering - Architecture - Materials - Jun 9, 2026When Material layer visibility is toggled on the Parent Material in a Material hierarchy, only the Parent’s layer visibility is affected, the children are not. Saving the Parent material has no effe ...