Rendering

Topic	Replies	Views	Activity
Lumen GI and Reflections feedback thread Lumen , unreal-engine , Staff-Pick-UE Hi everyone, I’m starting this thread for feedback and discussion about Lumen GI and Reflections in UE5. We’re under a lot of pressure with internal deadlines so can’t promise responses, but we will read everything here…	2355	146044	March 26, 2026
RAD Game Tools’ Oodle—cross-platform data compression solutions unreal-engine	29	15513	November 17, 2021
Path Tracer keeps invalidating samples after switching to one of the "Geom. Inspect." viewmodes question , unreal-engine	0	4	April 20, 2026
Mesh edge pixelated question , unreal-engine	0	6	April 20, 2026
When r.RayTracing.Shadows.Translucency is enabled, the directional light source angle causes distant shadows to blur and fade out. question , unreal-engine	1	12	April 19, 2026
UE 5.7 – Substrate + Clear Coat + Lumen HWRT causes colorfill square artifact question , bug-report , unreal-engine	2	36	April 19, 2026
Transparent (Masked) textures turn white at a distance. question , Textures , transparent , unreal-engine , masked	2	629	April 19, 2026
My lighting dissapears when rendering out from sequenncer question , unreal-engine	1	20	April 19, 2026
NOT Solved. Pixelated DOF issue on out of focus objects close to the camera when rendering through Movie Render Queue. (UE 5.6) unreal-engine	10	511	April 18, 2026
Substrate - Feedback Thread Rendering , unreal-engine , Physically-Based-Shading , Staff-Pick-UE , Substrate	781	42619	April 18, 2026
Windy foliage jittering in Path Tracer unreal-engine	0	10	April 18, 2026
smooth/sharp edges on RenderTarget/Texture2D question , unreal-engine	0	8	April 18, 2026
Why does Lumen produce different initial lighting results when reopening an Unreal Engine project? Lumen , question , Rendering , unreal-engine , ao	4	34	April 18, 2026
How to combine World Aligned Texture with Parallax Occulsion Offset? question , unreal-engine	2	28	April 18, 2026
UE5.4 shadow flickering/jitter on meshes at distance and in profile view unreal-engine	1	20	April 18, 2026
More Lighting Channels FeatureRequest , question , Lighting , unreal-engine , engine	4	36	April 17, 2026
The light radius setting has stopped working in my sceme. I only have very sharp shadows. twinmotion	0	15	April 17, 2026
The radius setting in my lights has stopped working. I only have sharp shadows question , twinmotion	0	5	April 17, 2026
[PROBLEM] Asset become "transparent" with lots of dots in the default light? unreal-engine	1	19	April 17, 2026
When the camera is set to be out of focus, there will be obvious mosaics near the focal plane. question , bug-report , Rendering , unreal-engine , Render	1	17	April 17, 2026
Unable to get the raytraceacceleration structure in a compute shader question , unreal-engine	8	49	April 17, 2026
Bug in VR Since 5.6 (and 5.7 preview) with Instanced Stereo + Baked Reflection Capture + Deferred Rendering + Post Process Volume unreal-engine	16	698	April 16, 2026
Build lighting data missing after setting level invisible and then visible again in a packaged build question , unreal-engine , Epic-Pro-Support	12	283	April 16, 2026
Cant draw additive alpha to rendertarget. Help. question , unreal-engine , render-target , draw	0	17	April 16, 2026
5.3 Heterogeneous Volume Rendering tips and tricks Lighting , Rendering , unreal-engine	76	34722	April 16, 2026
Project migrated from 5.6 to 5.7 - transparency breaks question , unreal-engine	1	19	April 16, 2026
HELP completely lost with the message "On mobile SkyAtmosphere needs a mesh tagged IsSky" unreal-engine	14	12021	April 16, 2026
Path tracing SSS Albedo Remapping — Unconditional G Correction Possible Bug question , unreal-engine	0	10	April 16, 2026
Megaplants VRTemplate question , unreal-engine , fab , unreal	0	12	April 16, 2026
5.6 Path Tracing Crash / Increased VRAM Usage question , unreal-engine , Epic-Pro-Support	7	589	April 16, 2026

Lumen GI and Reflections feedback thread

Lumen , unreal-engine , Staff-Pick-UE

Hi everyone, I’m starting this thread for feedback and discussion about Lumen GI and Reflections in UE5. We’re under a lot of pressure with internal deadlines so can’t promise responses, but we will read everything here…