Unreal Engine Issues

ExportMaterialUVDensities() gets the incorrect value where the alpha channel is referenced

ExportMaterialUVDensities() gets the incorrect value where the alpha channel is referenced (e.g. RegisterIndex of the texture is [3] or [7]) because FMeshRenderer::RenderMaterialTexCoordScales() use ...

MaterialTextureScale calculated incorrectly for materials with WorldPositionOffset

When a Material uses WorldPositionOffset, the MaterialTextureScale is calculated incorrectly because FMaterialUtilities::ExportMaterialUVDensities() calls FMeshRenderer::RenderMaterialTexCoordScales ...

Clear Coat looks incorrect in the Preview when Energy Conservation on Material is enabled for non Substrate rendering

Enabling Energy Conservation on Material makes Clear Coat Material look weird in Preview. It looks fine in the Level Editor, but not in any "Preview" type viewport (Material Editor, Asset Thumbnails ...

Improved handling of material functions for Virtual Texture usage validation in materials

To enable proper validation between virtual texturing and opacity masked materials, a user has to check a project-level setting in order to get the material to compile, otherwise, they will encounte ...

Assert triggering when trying to copy-paste an empty CurveAtlasRowParameter node in the material editor

A check happens when copy/pasting a Curve Atlas Row Parameter Expression that has no value. This behavior also exists on CL 32426910 of Release-5.4. ...

Edit Layers naming is being added to the Localization Dashboard

When a Material Instance with Layer Parameters is added to the Level Landscape, the Layer Names get added to the Localization Dashboard. ...

Using a Shading Model node set to Unlit results in an invalid material with FromExpression domain

Create a materialSet its domain to From ExpressionRecreate the node graph as in the screenshot Note that the preview sphere is black. ...

Physical Material Mask does not return the correct value

Reference to material collection by Index instead of by Name causes inconsistency

A UDN user reports materials referincing parameter collections by index instead of by name. The problem manifests itself when rearranging the order of parameters belonging to collections, as the edi ...

ResavePackages Commandlet Consistently Crashes in 5.3 In Material PreSave

Running the ResavePackages commandlet will consistently result in a crash. The callstack is here: Assertion failed: !IsRooted() [Link Removed] [Line: 265] UnrealEditor_Engine!UMaterialInterface::P ...