Unreal Engine Issues
Unreal Engine Issues
Duplicated PCG Component instance resets overridden parameters to default
UE - World Creation - Procedural Tools - PCG Component - Jun 4, 2025Context: Similar to parameters in the Material editor, PCG Graph Parameters are user created overridable values and can help create customizable graphs for a variety of situations. Problem: The l ...
Custom Primitive Data color widget not applying correctly to static mesh components in Blueprint editor.
UE - Rendering Architecture - Materials - Jul 23, 2025Context Custom Primitive Data is used to store custom data in an index array that is accessible through Blueprint and code. This allows for variations across instances of the same mesh without needi ...
GetAllocatedSize returns inaccurate number of bytes
UE - Foundation - Core - May 20, 2015When calling GetAllocatedSize() on a TBitArray it will round down the result of MaxBits / NumBitsPerDWORD. This means that not enough bytes are allocated when the MaxBits is not divisible by NumBi ...
Toggling a Spline component from an open/closed loop through bp's isn't reflected
Tools - Jan 19, 2015Toggling a Spline component from an open/closed loop through bp's isn't reflected ...
Complex Collision as Simple causes odd Overlap behavior
UE - Simulation - Physics - Jan 25, 2016When triggering overlap events with a Static Mesh using Complex Collision as Simple, the overlap Begin and End events will be triggered rapidly in sequence. Changing to Default collision will fix t ...
The OnUnPossess() method of the AAIController class is triggered twice
UE - AI - Apr 21, 2020The OnUnPossess() method of the AAIController class is triggered twice ...
Some post-processing passes sample outside of the viewport when using scene capture components
UE - Graphics Features - Nov 29, 2023It looks like the SSAO shader does not clamp its sample space to the half view size for the two inputs "Ambient Occlusion" and "AmbientOcclusionSetup", leading to invalid data entering the edge of f ...
Dynamic Parameters do not function in Beam Emitters
UE - Graphics Features - Apr 10, 2015Transfered Issue from TTP # 298314, originally opened in TTP on 6/3/2013 and updated with Answerhub post information on 5/18/2014 Dynamic Parameters cannot be used with a Beam Emitter, they pass no ...
Scene Capture 2D will default back to View 0
UE - Graphics Features - Oct 8, 2015The scene capture will revert back to the Character BP that is placed in the level when player 2 is not moving. When they are moving the scene captuer will show correctly. You can get around this ...
Moving all the related assets to another folder at once leads to reference lost in the contents browser.
UE - Editor - Content Pipeline - Content Browser - Aug 23, 2017Moving all the related assets into another folder leads to reference lost. This can be tested out using ShooterGame project. Also you can find materials in the skeletal mesh lost its texture. This ...