Unreal Engine Issues
Unreal Engine Issues
Blueprint NAND node should not be associative.
UE - Gameplay - Blueprint - Jan 6, 2016NAND is not an associative operation, so it should not use the markup that makes N+1 input nodes work by calling the underlying function N times. This was brought to light here: https://udn.unreale ...
Select Node literals not populated when type resolved by connecting a pin
UE - Gameplay - Blueprint Editor - May 4, 2017When you connect a pin to a select node and determine the type of the wild card pins the other option pins do not have their literal populated. This occurs for enums where no option is select and n ...
Volumetric Lightmap grid uneven placement over flat floor
UE - Graphics Features - Lumen - Jul 17, 2018https://udn.unrealengine.com/questions/441682/volumetric-lightmap-grid-anomaly.html Certain maps have large gaps in Volumetric Lightmap cell density where even density is expected. A repro map ...
Lighting channels not working as expected when enabling Ray Tracing Shadow
UE - Graphics Features - Lumen - Oct 13, 2020Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...
Nanite meshes don't render to RVT
UE - Rendering - Architecture - Jan 16, 2023Static meshes that use Nanite never write to RVT. We've been recommending a workaround to create a secondary non-nanite mesh component that only writes to RVT, but that is a big overhead for product ...
Soft Reference to redirector object (or ghost redirector)
UE - Gameplay - Components - Apr 26, 2023This seems be solved if asset is modify and saved again (Show in the video resource below ) [Link Removed] UDN Thread: https://udn.unrealengine.com/s/case/5004z00001nzoC9AAI/soft-reference-to-r ...
Allowed ranges for the different Exposure Settings in PPV are not consistent
UE - Rendering - Graphics Features - Jun 26, 2024https://udn.unrealengine.com/s/question/0D5QP000006g7Px0AI/auto-exposure-various Caused by inconsistent usage of ClampMin/ClampMax/UIMin/UIMax in Scene.h Ranges should also be modified based on ...
Crash in FPBDJointUtilities::ConditionInverseMassAndInertia
UE - Runtime - Simulation - Aug 8, 2024We seem to be setting the InverseInertia to zero, even though the InverseMass is non-zero. FPBDJointUtilities::ConditionInverseMassAndInertia assumes that the inverse inertia is only zero if the in ...
Unable to use AnimInstance metadata when using Passthrough Skeletal Mesh Component.
UE - Anim - Mutable - Jan 22, 2026With the standard non-passthrough flow you set the AnimBP on the SkeletalMesh node itself. With the passthrough SkeletalMeshComponent node I see no place to set the AnimBP. While I can set this manu ...
Attaching a removed Actor in Sequencer causes a crash
UE - Anim - Sequencer - Jan 6, 2020This is a regression from 4.23.1 (CL-9631420) where Sequencer just displayed the re-attached binding in yellow text instead of crashing. The user suggests that the deleted actor should be removed fr ...