Unreal Engine Issues
Unreal Engine Issues
Forward Rendering causes Volumetric Material to not render against background
UE - Rendering - Features - Nov 15, 2022Regression: Tested in UE5/Release-5.0, and the issue is reproduceable. This issue appears to occur when the SkySphere is deleted from the level, as leaving the SkySphere in the level causes the Vol ...
Sky Lights don't effect Translucent materials
UE - Rendering - Architecture - Materials - Nov 21, 2022Regression: Tested in UE5/Release-5.0, this issue does not occur so it is a regression Appears to be an issue with Lumen and Skylights with Cubemaps. Directional lights, point lights, etc. all work ...
Editor sometimes crashes when trying to compile an Animation Blueprint that extends a class with AnimInstanceProxy
UE - Runtime - Anim BP - Jan 10, 2023Reproduced 3/3 times, issue does not occur in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed Regression. Seems to work fine when compiled once, but after the 2nd or 3rd time it crashes. ...
LiDAR asset is distorted when reopening the level after closing it.
UE - Editor - Open File Formats - Feb 15, 2023Found an issue with the asset in the steps to reproduce in //UE5/Release-5.2 CL 24238206 Perforce. When closing and reopening the project the asset in the viewer shows up as distorted. The issue occ ...
Widget that is a derived from a child widget reports component variables as Invalid
UE - AI Workflows - UI Systems - Aug 23, 2023This is not a regression. Tested in //UE5/Release-5.2 CL26001984 A widget that is a derived from a child widget reports component variables as Invalid, while the child and parent of that child will ...
Anisotropy of base disappears when clear coat is greater than 0 when Substrate is enabled
UE - Rendering - Features - Shading Models - Jun 24, 2024Anisotropy from the base of a material disappears when clear coat is used. Car paint with base specular_anisotropy at 0.5 and coat at 0.0 [Image Removed] When coat is 0.0: [Image Removed] ...
Interchange Dialog view resets when changing values
UE - Editor - Open File Formats - Import and Export - Jul 25, 2024This happens with just about any option in any tab. QA confirmed it also happens in the Material tab. Regression: Yes - does not occur in //UE5/Release-5.4 @ CL34507850 - Binary Repro Rate: 10/10 ...
[AI] Area Class to Replace does not work on SplineNavModifierComponent
UE - Runtime - Character - Jun 16, 2025The SplineNavModifierComponent does not have the same behavior as regular nav modifier components where the modifier can specify that it only replaces a given NavArea class. Setting the area class t ...
Drag-and-drop any cooked Blueprint class asset into the level viewport crashes the editor
UE - Framework - Blueprint - Jul 14, 2025Dragging any cooked Actor-based Blueprint class asset into the level editor viewport will crash the editor when it has been configured to work with cooked assets. This is a regression that started ...
Dataless Mutable: Cloth Simulation Not Working With Skeletal Mesh Parameter Node?
UE - Runtime - Mutable - Nov 25, 2025Testing the new dataless Mutable workflow in Unreal Engine 5.7. When replacing the old Skeletal Mesh node with the new Skeletal Mesh Parameter node, the cloth simulation stops working. ...