Unreal Engine Issues
Unreal Engine Issues
[Groom] Very thin hair has incorrect raytraced shadow on edges
UE - Graphics Features - Lumen - Jun 8, 2020This only happens when 1) Hair Width is very small. e.g. 0.01 in the example 2) Light has raytraced shadow and Samples Per Pixel has a value > 1. e.g. 8 in the example The problem seems to be rel ...
Niagara Mesh Renderer's ParticleColor is not reflected in raytraced reflections
UE - Graphics Features - Lumen - Jun 2, 2020Mesh's ParticleColor is not reflected in raytraced reflections Sprite Particles do not encounter this issue. ...
Switching raytracing console variable in runtime can crash engine.
UE - Graphics Features - Lumen - May 13, 2020Licensee reported that is caused by missing ECVF_RenderThreadSafe flag in these console variable definitions. r.RayTracing.Shadows r.RayTracing.AmbientOcclusion r.RayTracing.Reflections Here is a ...
Crash occurs loading a sublevel containing landscape with ray tracing enabled
UE - LD & Modeling - Terrain - Landscape - May 13, 2020In raytracing enabled, When loading a sublevel containing landscape with LoadStreamLevel function following error is shown. Assertion failed: Pair != nullptr [Link Removed] [Line: 584] Licensee re ...
Thumbnails do not display shadows after opening and saving the asset
UE - Graphics Features - Lumen - Apr 14, 2020Shadows in an asset's thumbnail disappear after opening and saving the asset, whether changes are made or not. Tested: 4.24.3 CL#11590370, 4.25P6 CL#12493028, 4.26 CL#12767035 ...
Ray tracing shadows prohibit the subsurface color to show through the object
UE - Graphics Features - Lumen - Apr 6, 2020Ray tracing shadows prohibit the subsurface color to show through the object. ...
New VR-Basic level triggers Metal validation layer assertion
UE - Platform - Apple - Mar 16, 2020This was discovered externally and reported on UDN here: https://udn.unrealengine.com/questions/563268/mac-editor-crash-when-disable-ambient-occlusion.html ...
Hidden Shadows Aren't Rendered When Raytracing Is Enabled
UE - Graphics Features - Lumen - Mar 13, 2020Hidden shadows aren't rendered when ray tracing is enabled. Found in 4.25 Preview 2 CL#12055273 Reproduced in 4.23.1 CL#9631420, 4.24.3 CL#11590370, 4.26 Main CL#12123513 ...
Raytraced reflections are aliased, but reflections of reflections are not
UE - Graphics Features - Lumen - Mar 3, 2020Raytraced reflections contain aliasing, but the reflections of the aliased reflection do not. In the provided image, you will see plane C shows the reflection of the grid material with aliasing arti ...
Niagara and Groom causes exception crash on Launch when using
UE - Simulation - Physics - Mar 2, 2020Trying a Launch after every step shows that the problem occurs as soon as the GroomAssetSystem is added to Niagara. If the GroomAssetSystem is removed, the game launches fine (but the hair doesn't m ...