Unreal Engine Issues
Unreal Engine Issues
Landscape Layer Blending Painting Issue
UE - Graphics Tools - Terrain - Sep 10, 2025There are two issues when painting landscape layers.Paint: When painting between different layers, square-shaped artifacts or splotches appear.Fill Layer: The blended weights of other layers aren't ...
Crashes occur when executing MRQ while adding UMG with RetainerBox.
UE - Editor - UI Systems - Slate - Sep 9, 2025Create an asset containing a RetainerBox in UMG, then add the created UMG to the viewport using AddViewport. Running MRQ after this causes a crash. ...
Iris - removal of fast array item not performed on client when server array contains a non-replicated item
UE - Networking - Iris - Sep 8, 2025It is possible to add items to a replicated fast array that are not intended to be replicated to the clients. For example, FGameplayAbilitySpecContainer has a custom ShouldWriteFastArrayItem impleme ...
Undoing keyframe addition in Sequencer unselects actors in the Outliner
UE - Anim - Sequencer - Sep 8, 2025When a keyframe is added to a track in the Sequencer, undoing the operation correctly removes the keyframe, but it also unselects the actor. This becomes especially inconvenient when multiple actors ...
Crash when changing r.MaterialQualityLevel when FastGeo plugin enabled in cooked build
UE - World Creation - Worldbuilding Tools - Sep 5, 2025The engine crashes when the r.MaterialQualityLevel is changed in a cooked game that uses the FastGeo Streaming Plugin. The crash doesn't repro with the same steps in Editor, just in a cooked build. ...
Crash when opening a texture or editing its properties after stopping a preview in the material editor
UE - Rendering Architecture - Materials - Sep 5, 2025When a texture asset has certain properties edited, its PostEditChangeProperty() method calls to UTexture::NotifyMaterials(), which triggers a recompilation of materials that reference it in their m ...
'Malformed sequence hierarchy' ensure hit after modifying sub-sequence tracks
UE - Anim - Sequencer - Sep 5, 2025It's possible for there to be multiple instances of the same sequence in the evaluation states cache if the same sequence is used in multiple sub-sections. Caches are never removed from the evaluat ...
Client and server can both get stuck waiting for packet sequence history flush
UE - Networking - Sep 4, 2025The issue occurs when both instances have a significant difference between their last sent and last ack'd sequence number, as they will begin waiting for the sequence history to be flushed for a pac ...
Modifying the view size can cause TSR history to allocate large amount of memory
UE - Graphics Features - Sep 4, 2025When animating the split fraction of a splitscreen experience, TSR causes an significant increase in UAV memory. In PIX, this appears to be caused by TSR allocating the history multiple times when ...
MRQ - Subgraphs do not evaluate properly in Quick Render
UE - Virtual Production - Tools - MRQ - Sep 4, 2025Subgraphs do not seem to be evaluating properly with Quick Render. Message from the EPS: "While testing out Quick Render, I've found that subgraph nodes are not being evaluated. Digging into it dee ...