Unreal Engine Issues
Unreal Engine Issues
Two-sided geometry cannot be enabled for re-imported models when converting from previous versions
TM - Interoperability - Jan 28, 2025When converting files from previous versions of Twinmotion to Twinmotion 2025.1, re-importing any existing imported geometry will cause the geometry to be re-imported with two-sided geometry disable ...
Overridden mesh values are lost when upgrading from 5.5.0/5.5.1 to 5.5.2 on blueprint skeletal mesh components
UE - Anim - Runtime - Jan 30, 2025This issue is caused by the backout in 38341618. The original code that went into 5.0 affects serialization by changing the UCS modified properties. When upgrading, the override is lost because th ...
Improper clipping in children of a retainer widget
UE - Editor - UI Systems - Slate - Jan 21, 2025Children of retainer widgets have improper clipping, causing any widgets set to "Clip to Bounds" to clip incorrectly. This may also affect hit testing in cases where multiple retainer widgets are ne ...
Adding SmartObjectZoneAnnotationComponent to a blueprint actor causes a crash when building the package
UE - AI - SmartObject - Jan 30, 2025If placing an actor with SmartObjectZoneAnnotationComponent added to blueprint actor in a level, it will crash when the level open. As a workaround, adding SmartObjectZoneAnnotationComponent to the ...
Bindless Textures do not mip stream as expected
UE - Rendering Architecture - RHI - Jan 29, 2025Bindless textures do not appear to stream mip levels. This issue is separate from an already reported bindless virtual texture streaming issue. When the editor is freshly launched or when mip level ...
Regression: Cannot import Landscape Layer Weightmap along with Heightmap because of broken resolution check for tiled images.
UE - Graphics Tools - Terrain - Jan 30, 2025When working in the "Landscape" editor mode, in both the "New" and "Import" tools, it is possible to import a single heightmap, as well as a weightmap for each layer. Each of these maps can come fro ...
Visual Logger Timeline is not updated when Viewport is in fullscreen
UE - AI - Debugging - Jan 14, 2025Context The Visual Logger is a powerful debugging tool to create and record visual representations, and allows people to review the data. Problem The problem is that it does not record things don ...
Using Virtual Texture Streaming checkbox in texture editor can break materials
UE - Graphics Features - Feb 24, 2021A texture can be toggled between virtual texture and regular texture using the Convert to virtual texture/regular texture tool in the texture asset context menu. This updates referencing materials t ...
SharedStructMemory's custom deleter doesn't call ~SharedStructMemory and may result in a memory leak
UE - AI - Mass - Jun 10, 2024FSharedStructMemory uses a custom deleter that calls FMemory::Free, but it doesn't call the destructor. FSharedStructMemory's destructor is responsible for correctly destructing the internal ScriptS ...
[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync
UE - AI - Navigation - Jan 27, 2025Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...