Unreal Engine Issues
Unreal Engine Issues
Virtual Texture Collection Indexing Not Working
UE - Rendering Architecture - RHI - Oct 30, 2025Textures at an index, other than 0, cannot be sampled from a Virtual Texture Collection in a material. When using the Texture Collection and Texture Object From Collection material nodes, with a Vir ...
Static Mesh Contact Shadows still render when all LOD sections have Cast Shadows dissabled
UE - Graphics Features - Oct 30, 2025When the cast shadow checkbox is disabled for all sections that make up a static mesh the main shadow is no longer rendered but the contact shadow does not respect the instruction to disable shadows ...
Path Tracer Normals Issue
UE - Graphics Features - Path Tracer - Oct 29, 2025Path Tracing normal maps reflect light differently than Lit, and do not look accurate. Also observed in //UE/Release-5.6, CL: 45232827 ...
PCG - BiomeSample level crashes when opened with Instanced Stereo enabled
UE - World Creation - Procedural Tools - PCG Component - Oct 29, 2025When the user attempts to open the Biome Sample Level with Instanced Stereo enabled, the editor crashes with a fatal error: Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\P ...
World-Space widgets don't cast whadows when using VSM
UE - Graphics Features - Shadows - Oct 29, 2025When using Virtual Shadow Maps (VSM), widgets placed in world space do not cast any shadows. The same widgets correctly cast shadows when the Shadow Method is set to Shadow Maps instead of VSM. ...
Point Lights Invlidate Virtual Shadow Map Cache when at a distance from attenuation radius
UE - Graphics Features - Oct 28, 2025When the camera is outside of a certain distance from a point lights attenuation radius the VSM of that point light stops caching shadow maps. This can also be reflected in the output from the 'r.S ...
Uploading of the SBT via copy queue is not guaranteed to be synced with async compute queue but only direct queue in d3d12
UE - Graphics Features - Ray Tracing - Oct 28, 2025When HitLighting is enabled, SBT commit is running on the Graphic Queue, and the pass "LumenSceneLighting->offscreenshadows->LumenDirectLightingHardwareRayTracingRGS" that uses SBT could run on the ...
Niagara crash when using a particle attribute reader that has been passed around between modules
UE - Niagara - Oct 28, 2025The following Niagara usage pattern results in either a crash or in incorrect data being read from a Particle Attribute Reader: Emitter Spawn Stage – A module has an Attribute Reader input specifie ...
World Partition view has different orientation compared to top-down orthographic view
UE - World Creation - Worldbuilding Tools - World Partition - Oct 27, 2025Orthographic viewport orientations were re-worked as part of the effort to align UE's editing experience with other industry-standard DCC tools. The World Partition view is still using the legacy o ...
TOptional value changes in parent BP don't propagate to loaded child BPs
UE - Framework - Blueprint Editor - Oct 27, 2025Context TOptional<T> is a wrapping struct around a type, that lets the property have an set and unset state, in addition to the property's value when set. It is editor exposed: designers can open b ...