Unreal Engine Issues
Unreal Engine Issues
Sequencer particle toggle tracks evaluate one extra frame
UE - Anim - Sequencer - Jul 1, 2020It looks like particle toggle tracks use TimeRangeToNumberRange which gives the incorrect range as a result of CL 10893518 which fixed [Link Removed]. ...
Launching a specific UDN Project with Vulkan Support enabled crashes launching on Quest
UE - Platform - XR - Jul 30, 2020When attempting to run the attached Project submitted from UDN, it will crash on launch. If Vulkan support is disabled, the Project will run as expected on Quest. This issue DOES NOT appear to repro ...
Reflection looks much darker on Mobile Preview vs PC
UE - Graphics Features - Jan 13, 2021UPDATE: This is primarily due to the fact that it runs as Fullyrough on Mobile as long as a Constant 1 value was feed. Also on Mobile the FullyRough shading looks like simply remove all Highlights/R ...
When the value of the TMap variable of the child blueprint is changed and compiled, it will restore to the default value of the parent blueprint.
UE - Gameplay - Blueprint - Sep 1, 2021For TMap variables of type struct created in blueprint, if change the default value in child blueprint and compile, it will restore to the default value of the parent actor. This problem does not o ...
Crash occur when loading AInstancedPlacementPartitionActor
UE - Editor - Workflow Systems - May 17, 2022Crashes when loading an actor that inherits from AInstancedPlacementPartitionActor. There is a serialization size mismatch. ...
FDeferredDecalProxy cannot be initialized to not fade even if FadeDuration is set to 0
UE - Rendering Architecture - May 16, 2024FDeferredDecalProxy always fade because InitializeFadingParameters is always called and leaves InvFadeDuration at 1.0 and the LifetimeAlpha calculation in FDeferredDecalPS::SetParameters gets a very ...
PCG causes crash when UGrassInstancedStaticMeshComponent is set as a mesh entry for the static mesh spawner node
UE - World Creation - Procedural Tools - PCG Component - May 16, 2024PCG causes crash when UGrassInstancedStaticMeshComponent is set as a mesh entry for the static mesh spawner node. ...
Baking lighting on Nanite landscape crashes the editor
UE - Graphics Features - May 23, 2024When static lighting is baked using CPU lightmass for a nanite-enabled landscape it causes an editor crash with this assert: ...\Lightmass.cpp] [Line: 546] Attempting to add the same material twice ...
Add Substrate Material Support to Lumen Performance Overview
UE - Graphics Features - Substrate - Feb 10, 2025There is a discrepancy when inspecting Substrate materials in the Lumen Performance Overview. Compared to viewing non-Substrate materials the overview show all surfaces in red indicating that Lumen ...
Overlay materials stop working when Show Collisions
UE - Simulation - Physics - Apr 7, 2025Overlay Materials are disabled when the Collision showflag is enabled. ...