Unreal Engine Issues
Unreal Engine Issues
Regression: FAnimInstanceProxy memory leak when BeginDestroy() called on UAnimInstance before USkeletalMeshComponent
UE - Anim - Runtime - Feb 10, 2025In UE 5.5, the fix applied by CL 36529858 in ue5-main updated USkeletalMeshComponent::ClearAnimScriptInstance() to call AnimScriptInstance::UninitializeAnimation() on the animation instance. This, i ...
Backwards-compatibility broken for the CDOs of Python-generated Unreal Types because of missing redirectors
UE - Editor - Workflow Systems - Feb 11, 2025Previously, all Unreal Types generated by python scripts would be created inside package "/Engine/PythonTypes". This was changed by [CL 32478991 in ue5-main branch], which meant to "remove the restr ...
Inside the ViewportToolBar, the "Click to Expand" ComboButton works incorrectly with Display Scaling
UE - Editor - Applied Usability - Mar 12, 2025When Display Scaling is applied (e.g., 125%) and the Level Viewport is resized, the ComboButton in the SViewportToolBar does not behave as expected. Normally, the ComboButton hides when there is in ...
Changes to Instanced Properties default value on BP not propagated to placed actors in the opened level
UE - Foundation - May 15, 2025In UE versions 5.4 and onwards (as of CL 42589677 in Main), when an Instanced UObject property is defined in an Actor Blueprint, modifying the default value in the Blueprint does not propagate the c ...
Multiple setter functions in UMaterialEditingLibrary always return false even when the parameter is correctly set on the MaterialInstance.
UE - Rendering Architecture - Materials - May 30, 2025In Unreal Engine, materials can expose parameters that can then be modified via instances (MaterialInstanceConstant). The UMaterialEditingLibrary provides several functions to modify these parameter ...
After compile, spawnable actor is stuck in spawned state
UE - Anim - Sequencer - Jun 3, 2016After compile, spawnable actor is stuck in spawned state ...
MayaLT LOD groups fail to import into the editor
UE - Editor - Content Pipeline - Import and Export - Jan 20, 2016Given a simple LOD Group setup in MayaLT 2016 and exported with Default settings from LT as a 2014/15 FBX File, the FBX Fails to import. Given the same setup in Maya 2016 and Export Settings, the F ...
Windowed Fullscreen causes Lighting Variations in Rendered Envrionment
UE - Graphics Features - Jan 18, 2016When a scene is light with a single Stationary Directional Light and a Single Stationary Skylight and packaged to use Windowed Fullscreen, there is a difference in how the scene is rendered compared ...
High Res Screenshot Tool Scene Color rendering washed out as EXR
UE - Graphics Features - Dec 8, 2015When rendering out the Buffer Visualization Targets with the HDR setting on, the resulting Scene Color EXR is rendering significantly washed out compared to the Buffer Viz. in the Editor and if comp ...
SSR is not added to a Scene Capture2D on Update Frame
UE - Graphics Features - Oct 19, 2015When a Scene Capture 2D is not Capturing Every Frame but updated on Frame, the Screen Space Reflections are not updated with the rest of the Frame Update. With Capture Every Frame Turned On: [Imag ...