Unreal Engine Issues

Sound Mix Modifiers do not properly affect Sound Class

Sound mixers do not properly override variables within a sound class. This prevents users from being able to modify variables such as volume or pitch quickly and efficiently by using the push/pop st ...

StaticMesh->RenderData->LODResources[0].IndexBuffer empty in Standalone games.

GetArrayView is returning incorrect values in Standalone games. The correct values are returned when played in Editor. ...

[CrashReport] Crash on FMaterialEditor::OnCanPromoteToParameter()

This is a common crash in the 4.16 release (affecting Windows and Mac). A log file is attached. Users have not provided descriptions so additional information is not currently available. Windows C ...

Light does not affect landscape splines in raster pipeline (non-RT)

Spin Box delta does not appear to affect how the spin box increments through its values when clicking and dragging with the mouse

Spin Box delta does not appear to affect how the spin box increments through its values when clicking and dragging with the mouse. The spin box appears to increment/decrement by more or less dependi ...

Creating an HLOD with a FallbackMesh that has a section with triangles=0 will incorrectly set the UVs of the StaticMesh

The UVs in HLOD's StaticMesh appear to be broken when there are sections with zero triangles in the fallback mesh. This is most likely the case for sections containing only small parts. Workaroun ...

Changing preview mesh appears to affect initial transforms of all control rigs in level viewport

It seems that switching the preview mesh in the control rig editor is affecting the initial transforms in the hiearchies of related control rigs in the level viewport.  This seems to be due to the c ...

Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info

Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did NOT occur there ...

Metasounds - Using the Audio Component Play Node with a start timer other than 0 results in the Metasound ceasing to function

Metasounds cease functionality if called to Play with a different start time other than 0. This extends to the Metasound editor where pressing play to preview the sound also ceases to function. ...

Particle Cutout Will Clip Texture On Certain Frames Even With Alpha Threshold of 0.0001

A licensee has reported that the particle cutout feature will sometimes clip the image on some frames despite having an alpha threshold of 0.0001 The attached project has an example of this on the ...