Unreal Engine Issues

In editor, custom primitive data dont work on instance static meshes in bp instance

Changes to custom primitive data properties for instanced meshes placed in the editor work in-game but are not otherwise reflected in-editor. ...

UAssetDefinition doesn't allow overriding actions from base classes

In the new implementation UAssetDefinition to define the actions for asset we found that it isn't possible to delete or hide actions from parent classes due to the ToolMenu system works with delegat ...

Displaying Revision control history for a file ending in an "undo" of a revision can cause a crash

This crash is caused by how source control history is managed and shown. In this specific case the source control software is Perforce. As written in the repro steps, it can happen to any uasset tha ...

Editor will crash if a material uses ImposterCaptureSwitch material function after build lighting

Special characters in file names are not escaped on Perforce commands

Files and directories with special characters %, @, * and # are not escaped when sent to the P4 Client API. For example, an '@' character is common in root workspace folders when using concurrent bu ...

UGS perforce login does not work with 2FA flow

The perforce login flow for UGS does not properly handle a perforce server using 2FA login flow ...

Infinite saving loop with material attributes and VT

UDN: [Link Removed] ...

Custom HLSL's IncludeFilePaths should be injected into MaterialTemplate.ush

udn: [Link Removed] This appears to only be an issue with SN_DBS. DBS calls a function to gather all shader includes, and any custom hlsl includes aren't discovered causing that file to not be cop ...

Can't set "r.Shaders.Optimize" to false in UE5.4

The CVar "r.Shaders.Optimize" cannot be set to false from DefaultEngine.ini in the section "[ShaderCompiler]" as its help text describes. Also tested on UE5-Main, CL: 34200103 ...

Problem with material layers using interpolator nodes

The Vertex Interpolator Material Expression appears to collapse separate instances from separate Material Layers, leading to visual artifacts when used. Also tested on UE5_Main, CL: 34200103 ...