Unreal Engine Issues

Material Instance values lost when using Material Parameters inside of multiple Material Functions

Material Instance parameters (that derive from parents using material functions) can have their data shifted or not saved. ...

AnimSequence's play rate is doubled when in a SyncGroup

It is because that the RateScale is multiplied twice. First at UAnimSequenceBase::TickAssetPlayer : {{ const float PlayRate = Instance.PlayRateMultiplier * this->RateScale;}} Second at UAnimSeq ...

Generate Lightmap UVS Doesn't Update the Lightmap Coordinate Index

When importing an fbx file and using 'generate lightmap uvs', the light map coordinate index will not update correctly. Working properly in 4.19 CL# 4033788 Found in 4.20 CL# 4212847 and 4.21 CL# ...

Physics replication is not working correctly and clients receive different results

Physics replication is not working properly. The replicated physics are different than what is on the server. The user who reported this issue pointed out this line as well which seems to not do any ...

Impossible to Batch Build on UnrealVS with Japanese Visual Studio

Crash when opening a different level after opening the preloaded level using Asset Manager

After  opens the preloaded level using Asset Manager, opening another level before unloading the level will crash. Because AssetManager holds FStreamableHandle of the level, garbage collection is no ...

Shader Complexity viewmode does not work on masked materials

In engine versions 4.23 and above, the Shader Complexity Viewmode doesn't render appropriately for meshes with masked materials. Tested in 4.22.3 (CL - 7043647), 4.23 (CL - 8386587), 4.24 (CL - 961 ...

Single Channels From a Curve Atlas Node Does Not Remap to New Values

Single Channels from a Curve Atals Node Does Not Remap to New Values. Working as expected in 4.22 CL# 7053642 Found in 4.23 CL# 8386587, 4.24 CL# 9630693, 4.25 CL# 9615021 This is a regression. ...

[Landscape] Multiple Level Instances with Landscape causes duplicate GUID issues.

Loading the same level twice through Load Level Instance BP Node will cause issues with levels containing Landscape as they will end up with the same GUID and the underlying systems do not support t ...

Landscape Paint Layers will not scroll to the end when using mouse wheel

In a normal detail panel, each element has its own SDetailSingleItemRow and are mostly uniformly sized with some exceptions of having a few bigger rows (i.e. asset pickers). However, these layers ar ...