Unreal Engine Issues
Unreal Engine Issues
GPULightmass baking issues on AMD
UE - Graphics Features - Jul 28, 2025Volumetric Light Maps are not generated correctly when baked with GPU Lightmass on AMD GPUs. The issue has been reproduced on RX 9070, RX 9070 XT, and RX 7900 XT. ...
Landscape visualizers don't work on nanite landscape
UE - Graphics Tools - Terrain - Nov 24, 2025Landscape visualizers do not work on Nanite Landscapes. Also tested in //UE5/Main/, CL: 48569009 The licensee has provided a patch file with a potential fix. ...
HZB occlusion is broken on Instanced Stereo
UE - Platform - XR - Oct 2, 2025Other engine features requiring HZB data (such as per-instance GPU LOD selection occlusion culling or light grid culling) are also impacted regardless of whether r.HZBOcclusion is enabled. ...
Assigning APX Cloth asset to material element
UE - Simulation - Physics - Character - Jun 17, 2016When assigning an imported apx file to the clothing drop down under the material element of this imported Skeletal Mesh will result in a crash. Tested in: 4.11.2 CL-2946394 4.12.3 CL-3013449 Dev ...
Duplicated blueprints lose components
UE - Gameplay - Blueprint - Nov 2, 2015Blueprints that have been updated from previous engine versions lose components if duplicated. The original blueprint retains all components but all duplicates lose them. ...
Typo in Auto Activate Tooltip within Blueprint Components
UE - Gameplay - Oct 12, 2015Blueprint tooltip on auto activate within a blueprint component reads: Whether to the component is activated at creation or must be explicitly activated. It should read: Whether the component ...
Shuffling often does not shuffle last index of array
UE - Gameplay - Blueprint - Oct 7, 2015Shuffle disproportionately does not shuffle last index in the array when using the "Shuffle Array" node. ...
Swarm Agent Local Host of Coordinator not showing up in Coordinator
UE - Foundation - Core - May 26, 2015A Computer which is hosting the Swarm Coordinator no longer shows up as a viable Swarm Agent Computer and if that computer builds lighting will only use itself and not any available agents. Also re ...
Editor slows exponentially when selecting an instanced static mesh in viewport that has a large number of instances
Tools - Jan 19, 2015Editor slows down exponentially when spawning in a large quantity of instanced meshes. ...
Re-importing JSON File Causes a Blank Editor Window Until the Asset is Reopened
UE - Editor - Content Pipeline - Import and Export - Jul 11, 2016Re-importing a JSON file causes the asset window to be cleared out until the file is reopened in the editor. ...