Unreal Engine Issues
Unreal Engine Issues
GPU ISM LOD uses bounds length instead of radius
UE - Graphics Features - Jul 19, 2024When calculating LOD for instances on GPU in NaniteCullingCommon.ush we use:float RadiusSq = length2(LocalBoxExtent); This doesn't exactly match the CPU logic for static mesh component LOD select ...
GPU Lightmass does not support bounce lighting from landscapes
UE - Graphics Features - Jun 29, 2024GPU Lightmass does not support bounce lighting from landscapes, but CPU Lightmass does. ...
Incorrect error icon on stationary lights in a sublevel when the sublevel is first added
UE - Graphics Features - Jun 26, 2024When you add a level with stationary lights to another level as a sublevel they will show a first error icon on the lights. Once you close the project or refresh the level this icon is shown as nor ...
Bright Flickering or Black Squares with Rectangle Lights Intersecting Meshes
UE - Graphics Features - May 31, 2024Rect Lights that intersect geometry can produce NaN pixels in SceneColor, which will affect bloom, FXAA, and other future passes. This can lead to large visible artifacts. The NaN values are produc ...
LocalHeightFog placed in 5.3 projects are invalid and not appearing when the project is updated to 5.4
UE - Graphics Features - May 24, 2024LocalHeightFog actors placed in levels for 5.3 projects are invalid and not appearing in levels after the project is upgraded to 5.4. This is likely due to LocalHeightFog being renamed to LocalFogVo ...
Baking lighting on Nanite landscape crashes the editor
UE - Graphics Features - May 23, 2024When static lighting is baked using CPU lightmass for a nanite-enabled landscape it causes an editor crash with this assert: ...\Lightmass.cpp] [Line: 546] Attempting to add the same material twice ...
Local fog volume rotation causes offset issues at high world position values
UE - Graphics Features - May 20, 2024Local fog volumes have a substantial offset when placed at a far distance from world origin and is then rotated. This was not the case in 5.3 when tested under the same conditions, so this is likely ...
Rect light artifacts from NaN pixels on surfaces that are coplanar with light position
UE - Graphics Features - May 10, 2024Rect lights cause artifacts (nan pixels) on pixels of surfaces that are coplanar with light position. In RectLight.ush, in RectIrradianceLambert, at line 106, c30 is -1, so rsqrt(0) causes a nan to ...
Moving noise is visible in hair shadows when Lumen screen traces are active
UE - Graphics Features - Apr 18, 2024Dark moving noise is visible in hair in the shadows when Lumen screen traces are active. Example of noise when screen tracing is frozen:[Image Removed] Turning off Lumen screen traces using r.Lume ...
Eye Shading Model renders Emissive unexpectedly when using a FloatRGBA scene format
UE - Graphics Features - Apr 5, 2024This appears to be caused by the colour format. It only occurs when the scene format has an alpha channel. FloatRGB (format 3) doesn’t exhibit these issues. Unfortunately, format 4 is the default fo ...