Unreal Engine Issues

MultiProcessCook Shader Symbols fail to write when two workers race and try to write them at the same time

When shadersymbols are requested, cooking shaders writes the symbol files into {Project} /Saved/ShaderSymbols/<PlatformName>. These symbols are written by the function FShaderSymbolExport::Write ...

Transform does not update after first time for Instance Static mesh in Blueprint Editor

In 4.15 When you update the transform of an instance static mesh a second time the editor does not update the location, to get the update to display correctly you must close and re-open the blueprin ...

Sequencer Render: Animation not updating for a moment on camera cut

When rendering from sequencer to an image sequence, character animation stops for 2 frames after a camera cut. This hitch does not occur when playing the sequence in PIE I've attached some sample d ...

Combo box default selected option text does not show up when the widget is outside of the bounds of a containing widget

The text for the selected option on a combo box does not show up if the text has been placed fully outside of a containing widget. As in this example the combo box has been moved via render translat ...

Scale by Safe zone setting for Scale box does not scale children as expected

Children of a scale box that is set to Scale by safe zone do not appear to scale as expected. ...

MoviePipeline: Field of View doesn't match viewport when using the Squeeze Factor property

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 ...

Autokey does not respect min and max limits of control rig animation channel.

When using min or max set values for animation channels in sequencer, the sequencer viewport will show different values than what is capable when using autokey functionality. ...

Material Editor Viewport does not display World Position Offset

The preview Viewport in the Material Editor does not correctly render World Position Offset. It appears that the RenderVelocities pass (which is also drawing the depth for the preview sphere) does ...

Foliage Instanced Static Meshes disappear when FISM Component BP is compiled

This bug removes foliage from a level when the Component Blueprint is compiled. Switching the Foliage type asset to another component will cause the issue to stop occurring. The Component Blueprint ...