Unreal Engine Issues
Unreal Engine Issues
Blurry RVTs after camera jump
UE - Graphics Features - Aug 7, 2025When using Runtime Virtual Textures (RVT) on landscape in UE 5.5+, nearby tiles may remain blurry (low-resolution mips) after launching PIE or making large camera jumps (e.g. via bookmarks or viewpo ...
Sky appears black in some exported renders
TM - Rendering - Jun 24, 2025Reported by beta user in SF [Link Removed] User exported an image with Path Tracer and the exported render displayed the sky as black. This issue seems to be very low repro, and neither myself or ...
Fix up GPU breadcrumb labels for Intel performance analysers
UE - Rendering Architecture - RHI - Jun 13, 2025A licensee has brought up that the GPU breadcrumbs are incorrectly displayed with traces taken on the Intel GPU Analyzer tools (see screenshot). It looks like the format string is being passed on in ...
Switching project monitor with shift+win+arrow keys
UE - Rendering Architecture - RHI - Apr 24, 2025Using Windows+Shift+Arrow keys to move the application window in Windowed Fullscreen from a low resolution monitor to a high resolution monitor does not resize the application window on a Windows 10 ...
Missing material maps on user library objects created in TM 2022
TM - Core - Apr 23, 2025Reported by user in SF [Link Removed] User library assets created in TM 2022.2.3 or older will not contain texture maps for their materials when the .tmi file is added to the TM 2025.1.1 User Libra ...
Some Twinmotion library assets do not render in Path Tracer in files with a large number of assets
TM - Rendering - Apr 17, 2025Reported in SF [Link Removed] In scenes containing large numbers of certain Twinmotion assets, when activating Path Tracer, some of the assets will not render. The assets will render normally in St ...
Landscape raytracing geometry always updates every frame
UE - Graphics Features - Ray Tracing - Apr 11, 2025LOD 0 Landscape meshes are always updated in FLandscapeComponentSceneProxy::GetDynamicRayTracingInstances because* r.RayTracing.Geometry.Landscape.LODsUpdateEveryFrame* (GLandscapeRayTracingGeometry ...
Animation - Imported fbx animation mesh appears distorted
TM - Tools - Apr 9, 2025Reported by user in SF [Link Removed] An animated FBX file from Mixamo appears with a distorted mesh inside Twinmotion. Distortion appears regardless of settings used for import. ...
Lack of multi-bounce when using software traced lumen radiosity
UE - Graphics Features - Lumen - Apr 4, 2025Certain Lumen Hardware Ray Tracing CVars, when disabled in isolation, will not fall back to tracing the Global Distance Field, because the Global Distance Field is still disabled. The function "Lum ...
Reflection capture doesn't work when using Lumen GI and SSR
UE - Rendering Architecture - Mar 24, 2025Reflection Capture does not appear to work with Lumen + SSR. Licensees have reported that there are cases where they want to combine Lumen GI, SSR and Reflection capture for quality and performance ...