Unreal Engine Issues
Unreal Engine Issues
Transition ratio getter function not correct for interrupted transitions.
OLD - Anim - Apr 7, 2016The transition ratio getter simply uses ElapsedTime/Crossfade for the alpha on the transition. Normally this is sufficient, although if you blend between two states A and B such that you interrupt ...
Dynamic NavMesh disappears when loading/unloading SubLevels
UE - AI - Nov 9, 2018A DynamicNavMesh within a NavMeshBoundsVolume placed in a SubLevel will disappear if loading/unloading another SubLevel that has completely nothing to do with the DynamicNavMesh. Using a setup with ...
Unreal Header Tool can sometimes fail if an Engine plugin is Enabled By Default and has the "Program" Module Type set
UE - Foundation - Core - Feb 15, 2018An Engine plugin with the Program module type and EnabledByDefault set to true can cause the Engine to fail to build successfully due to UHT failing. I was only able to reproduce this behavior using ...
Widget "Listen For Input Action" executes on unexpected input event
UE - Editor - UI Systems - Feb 19, 2020Listen For Input Action firing erroneously. Confirmed in 4.26 MAIN @ CL 11536993 ...
Mutable constant texture variable with ClipUV mask only works with new experimental dynamic variable is connected as well
UE - Anim - Mutable - Sep 22, 2025We are attempting to use Mutable in 5.6.1 and have encountered an issue which we are not sure how to resolve. The issue occurs when using the ClipWithUVMask node. In short we have a customizable o ...
Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior
UE - Runtime - Simulation - Nov 21, 2024Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior. In the repro project provided (see addl in ...
Shortcuts do not appear to work for the visual logger
UE - AI - Nov 16, 2017Shortcuts do not appear to work for the visual logger in the editor preferences ...
Crash when toggling the SmartLinkEnabled state of a NavLinkProxy specifically in a packaged game targeting Debug/Development
UE - Runtime - Character - Jan 24, 2025The licensee has reported, and I was able to reproduce, that specifically in package builds targeting Development configuration, trying to toggle the SmartLinkEnabled state of a NavLinkProxy will cr ...
Async Physics incorrectly interpolates when multiple physics ticks pass
UE - Runtime - Simulation - May 28, 2024If a user set the transform of a Body from the game thread and physics is running multiple async ticks perf game tick, the transforms might be being calculated incorrectly. ...
Visible dithered quantization to remove banding in New Temporal AA Quality
UE - Graphics Features - Oct 6, 2015Since changing the temporal history buffer to 11:11:10 from FP16, it looks as there is visible dithered quantization to remove banding when rendering. (Taken from conversation on Forum Post linked f ...