# Rendering **URL:** https://forums.unrealengine.com/c/development-discussion/rendering/36.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Lumen GI and Reflections feedback thread](https://forums.unrealengine.com/t/lumen-gi-and-reflections-feedback-thread/501108)
**Author:** [@Daniel\_Wright](https://forums.unrealengine.com/u/Daniel_Wright)\ **Replies:** 2381\ **Last updated:** [November 6, 2026, 7:10am UTC](https://forums.unrealengine.com/t/lumen-gi-and-reflections-feedback-thread/501108 "2026-11-06T07:10:39Z")
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… --- ## [RAD Game Tools’ Oodle—cross-platform data compression solutions](https://forums.unrealengine.com/t/rad-game-tools-oodle-cross-platform-data-compression-solutions/211329)
**Author:** [@Amanda.Schade](https://forums.unrealengine.com/u/Amanda.Schade)\ **Replies:** 29\ **Last updated:** [November 17, 2021, 4:05am UTC](https://forums.unrealengine.com/t/rad-game-tools-oodle-cross-platform-data-compression-solutions/211329 "2021-11-17T04:05:28Z")
Good news! RAD Game Tools’ industry-leading compression technology Oodle is now available via the internal Unreal Engine development branch on GitHub, with binary support arriving in Unreal Engine 4.27 and Unreal Engine … --- ## [Question about scalar parameter slider ](https://forums.unrealengine.com/t/question-about-scalar-parameter-slider/2853476)
**Author:** [@STARLEE](https://forums.unrealengine.com/u/STARLEE)\ **Replies:** 1\ **Last updated:** [November 11, 2026, 12:36pm UTC](https://forums.unrealengine.com/t/question-about-scalar-parameter-slider/2853476 "2026-11-11T12:36:14Z")
Im new to Unreal Engine and following a master material tutorial I found on YouTube. When I move a slider between 0 and 1 using the parameters, the material preview in the top-left corner only updates when I release the … --- ## [Game hangs on shader creation after Nvidia Driver update to 621.14 ](https://forums.unrealengine.com/t/game-hangs-on-shader-creation-after-nvidia-driver-update-to-621-14/2851051)
**Author:** [@sds\_jyerkes](https://forums.unrealengine.com/u/sds_jyerkes)\ **Replies:** 1\ **Last updated:** [November 10, 2026, 8:37pm UTC](https://forums.unrealengine.com/t/game-hangs-on-shader-creation-after-nvidia-driver-update-to-621-14/2851051 "2026-11-10T20:37:29Z")
After updating to Studio or Game Ready drivers version 621.14, the game hangs on launch. Downgrading to Game Ready 617.42 seems to get it back in a working state. Game is UE 5.8 using Nvidia Streamline Core plugins. --- ## [Light bleeding throught walls](https://forums.unrealengine.com/t/light-bleeding-throught-walls/2852406)
**Author:** [@SufiGamesYT](https://forums.unrealengine.com/u/SufiGamesYT)\ **Replies:** 2\ **Last updated:** [November 10, 2026, 5:59pm UTC](https://forums.unrealengine.com/t/light-bleeding-throught-walls/2852406 "2026-11-10T17:59:20Z")
Why is the light in the biulding is bleeding through walls? --- ## [Tone mapper in unreal engine](https://forums.unrealengine.com/t/tone-mapper-in-unreal-engine/2705211)
**Author:** [@Ibtesam\_Sadiq](https://forums.unrealengine.com/u/Ibtesam_Sadiq)\ **Replies:** 5\ **Last updated:** [November 9, 2026, 6:12pm UTC](https://forums.unrealengine.com/t/tone-mapper-in-unreal-engine/2705211 "2026-11-09T18:12:09Z")
Please Add build in option to select tonemapper from project or post process setting. And Please add muliple tonemapppers in unreal engine to choose from. it would be great to have muliple tone mapper right inside unrea… --- ## [GameThread timed out waiting for RenderThread after 120.00 seconds ](https://forums.unrealengine.com/t/gamethread-timed-out-waiting-for-renderthread-after-120-00-seconds/2689109)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 3\ **Last updated:** [November 9, 2026, 11:29am UTC](https://forums.unrealengine.com/t/gamethread-timed-out-waiting-for-renderthread-after-120-00-seconds/2689109 "2026-11-09T11:29:21Z")
Hello, one of our players sent us their crash dump from a freeze. Here is the crash message from the CrashContext: \GameThread timed out waiting for RenderThread after 120.00 seconds: 0x00007ff936aa1d44 nt… --- ## [Epic's GPUlightmass](https://forums.unrealengine.com/t/epics-gpulightmass/139357)
**Author:** [@maxbrown](https://forums.unrealengine.com/u/maxbrown)\ **Replies:** 1048\ **Last updated:** [November 9, 2026, 4:39am UTC](https://forums.unrealengine.com/t/epics-gpulightmass/139357 "2026-11-09T04:39:13Z")
Epic recently revealed their code for their GPUlightmass in the dev-rendering branch on GitHub. Some people are already playing with it and some (like me) are running into issues. I think it could be nice if people’s ex… --- ## [HISM flickering when any character is visible ](https://forums.unrealengine.com/t/hism-flickering-when-any-character-is-visible/2699224)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 9\ **Last updated:** [November 8, 2026, 10:16pm UTC](https://forums.unrealengine.com/t/hism-flickering-when-any-character-is-visible/2699224 "2026-11-08T22:16:37Z")
Hello, since updating from UE 5.4 to UE 5.6 we’ve an issue with flickering HISM objects when some character is visible. The characters are Metahumans. It only appears for some LODs of the characters. You can find a vide… --- ## [Lumen indirect light is exactly zero: here is where it works and where it stops](https://forums.unrealengine.com/t/lumen-indirect-light-is-exactly-zero-here-is-where-it-works-and-where-it-stops/2844467)
**Author:** [@FrankieDcreator](https://forums.unrealengine.com/u/FrankieDcreator)\ **Replies:** 3\ **Last updated:** [November 6, 2026, 7:55pm UTC](https://forums.unrealengine.com/t/lumen-indirect-light-is-exactly-zero-here-is-where-it-works-and-where-it-stops/2844467 "2026-11-06T19:55:38Z")
Engine and setup: Unreal Engine 5.4.4, Linux editor running headless on a cloud machine, NVIDIA RTX A5000 (driver 535.183.01), Vulkan. Project is an open world city blockout: 296 static mesh components built from 4 basic… --- ## [Export baked lighting](https://forums.unrealengine.com/t/export-baked-lighting/2849195)
**Author:** [@gh0stfase1](https://forums.unrealengine.com/u/gh0stfase1)\ **Replies:** 1\ **Last updated:** [November 6, 2026, 2:28pm UTC](https://forums.unrealengine.com/t/export-baked-lighting/2849195 "2026-11-06T14:28:39Z")
A bit of sleuthing says this isn’t a thing but I just wanted to make sure… I’ve got a completely baked lighting scene setup in UE. I’m wanting to save off the textures for each mesh in the scene, including the lighting…… --- ## [\[Gpu hung\] RenderVirtualShadowMaps(Nanite) - NodeAndClusterCull ](https://forums.unrealengine.com/t/gpu-hung-rendervirtualshadowmaps-nanite-nodeandclustercull/2661642)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 10\ **Last updated:** [November 5, 2026, 12:47am UTC](https://forums.unrealengine.com/t/gpu-hung-rendervirtualshadowmaps-nanite-nodeandclustercull/2661642 "2026-11-05T00:47:14Z")
All the crash file is below. --- ## [MSAA doesn't seem to work properly with local fog volumes - 5.8.4](https://forums.unrealengine.com/t/msaa-doesnt-seem-to-work-properly-with-local-fog-volumes-5-8-4/2847894)
**Author:** [@SpazzGibbon](https://forums.unrealengine.com/u/SpazzGibbon)\ **Replies:** 1\ **Last updated:** [November 4, 2026, 4:58pm UTC](https://forums.unrealengine.com/t/msaa-doesnt-seem-to-work-properly-with-local-fog-volumes-5-8-4/2847894 "2026-11-04T16:58:01Z")
I narrowed down a problem to do with volumetric local fog volumes and MSAA when using the forward renderer. I had an error pop up only when I had a local fog volume actor in the scene, and MSAA was enabled. Repo steps: … --- ## [Extrapolate clamped texture with fixed color](https://forums.unrealengine.com/t/extrapolate-clamped-texture-with-fixed-color/411014)
**Author:** [@anonymous\_user\_04f32a061](https://forums.unrealengine.com/u/anonymous_user_04f32a061)\ **Replies:** 4\ **Last updated:** [November 4, 2026, 3:05pm UTC](https://forums.unrealengine.com/t/extrapolate-clamped-texture-with-fixed-color/411014 "2026-11-04T15:05:26Z")
I want to set a small texture onto a large object, that only consists of one face. So I unwraped this face (in Blender) and scaled it up in the UV editor. The more I scale it up, the smaller the texture is on the object.… --- ## [UE 5.8 is Hierachical Instance meshes not supported for Lumen?](https://forums.unrealengine.com/t/ue-5-8-is-hierachical-instance-meshes-not-supported-for-lumen/2841638)
**Author:** [@YogaindoCR](https://forums.unrealengine.com/u/YogaindoCR)\ **Replies:** 6\ **Last updated:** [November 3, 2026, 7:54pm UTC](https://forums.unrealengine.com/t/ue-5-8-is-hierachical-instance-meshes-not-supported-for-lumen/2841638 "2026-11-03T19:54:47Z")
I noticed that lumen reflection for HISM (Hierachical Instanced Meshes) are black! The weird thing is ISM is working pretty much fine with lumen Is this a limitation for HISM with lumen scene? HISM Lumen Scene: HI… --- ## [Water ripples not centered around the character.](https://forums.unrealengine.com/t/water-ripples-not-centered-around-the-character/2846782)
**Author:** [@Dejan33](https://forums.unrealengine.com/u/Dejan33)\ **Replies:** 2\ **Last updated:** [November 3, 2026, 1:55pm UTC](https://forums.unrealengine.com/t/water-ripples-not-centered-around-the-character/2846782 "2026-11-03T13:55:39Z")
I am using water and advanced water plugins. Water body custom for water. Simulated Character Ripples tutorial from epic. Here is the result: Its a first person character, and this ripples should be where he is stand… --- ## [Smoke Particle effect changing opacity based on camera position. ](https://forums.unrealengine.com/t/smoke-particle-effect-changing-opacity-based-on-camera-position/2846406)
**Author:** [@Dannyboyriffic19](https://forums.unrealengine.com/u/Dannyboyriffic19)\ **Replies:** 1\ **Last updated:** [November 3, 2026, 10:45am UTC](https://forums.unrealengine.com/t/smoke-particle-effect-changing-opacity-based-on-camera-position/2846406 "2026-11-03T10:45:21Z")
Hi there, I’m having a strange issue I just can’t seem to fix. I’m trying to render a short video clip of my character with the Content Starter particle effect P Smoke. The issue is when I slightly pan the camera down li… --- ## [Horizontal stripes shader not tiling over geometry as expected](https://forums.unrealengine.com/t/horizontal-stripes-shader-not-tiling-over-geometry-as-expected/2846921)
**Author:** [@CresCoJeff](https://forums.unrealengine.com/u/CresCoJeff)\ **Replies:** 2\ **Last updated:** [November 3, 2026, 9:53am UTC](https://forums.unrealengine.com/t/horizontal-stripes-shader-not-tiling-over-geometry-as-expected/2846921 "2026-11-03T09:53:48Z")
I’m trying to make a striped stocking shader in UE5’s material node editor and am encountering strange rendering behavior when it is applied to the target geometry. The original shader was done in Blender and looks like … --- ## [Virtual Shadow Maps for high quality rendering / cinematics](https://forums.unrealengine.com/t/virtual-shadow-maps-for-high-quality-rendering-cinematics/1922741)
**Author:** [@EVEIMAGES](https://forums.unrealengine.com/u/EVEIMAGES)\ **Replies:** 10\ **Last updated:** [November 3, 2026, 2:02am UTC](https://forums.unrealengine.com/t/virtual-shadow-maps-for-high-quality-rendering-cinematics/1922741 "2026-11-03T02:02:29Z")
Hello together! I’d like to share a quick hint on how to get rid of some ugly VSM artefacts and maybe some people would like to share their tips and tricks when using VSMs for hq rendering / cinematics. In general we g… --- ## [Unreal 5.7 MRQ render Motion Vector Pass not working ](https://forums.unrealengine.com/t/unreal-5-7-mrq-render-motion-vector-pass-not-working/2847958)
**Author:** [@Rahul\_UE](https://forums.unrealengine.com/u/Rahul_UE)\ **Replies:** 3\ **Last updated:** [November 2, 2026, 6:40pm UTC](https://forums.unrealengine.com/t/unreal-5-7-mrq-render-motion-vector-pass-not-working/2847958 "2026-11-02T18:40:17Z")
I render this scene in Unreal 5.7 MRQ in EXR with additional post process pass turn on but in my render EXR. The beauty and World Depth is coming perfectly but the Motion Vector Pass is Coming Flat Yell… --- ## [The noise in UE5 is Unreal!](https://forums.unrealengine.com/t/the-noise-in-ue5-is-unreal/2848671)
**Author:** [@TorQueMoD](https://forums.unrealengine.com/u/TorQueMoD)\ **Replies:** 2\ **Last updated:** [November 2, 2026, 1:15pm UTC](https://forums.unrealengine.com/t/the-noise-in-ue5-is-unreal/2848671 "2026-11-02T13:15:05Z")
This has been an issue since day one, and it has gotten better especially with shadows, but it’s still terrible with translucent materials. Is it still not possible to get rid of this noise? Changing the AntiAliasing… --- ## [Directional light passing through everything](https://forums.unrealengine.com/t/directional-light-passing-through-everything/2848581)
**Author:** [@OncePhased](https://forums.unrealengine.com/u/OncePhased)\ **Replies:** 1\ **Last updated:** [November 1, 2026, 6:38pm UTC](https://forums.unrealengine.com/t/directional-light-passing-through-everything/2848581 "2026-11-01T18:38:55Z")
So I’ve used ue for years but I have never been this stumped. The first picture is when I have a directional light, and the second one is when I don’t have a directional light. I want to have a directional light but i do… --- ## [Persistent Flickering and Fine Visual Noise in UE 5.7/5.8 – RTX 5060 Ti and RTX 4070 ](https://forums.unrealengine.com/t/persistent-flickering-and-fine-visual-noise-in-ue-5-7-5-8-rtx-5060-ti-and-rtx-4070/2848528)
**Author:** [@shiwa1983](https://forums.unrealengine.com/u/shiwa1983)\ **Replies:** 0\ **Last updated:** [November 1, 2026, 2:56pm UTC](https://forums.unrealengine.com/t/persistent-flickering-and-fine-visual-noise-in-ue-5-7-5-8-rtx-5060-ti-and-rtx-4070/2848528 "2026-11-01T14:56:53Z")
Persistent Flickering and Fine Visual Noise in Unreal Engine 5.7 / 5.8 – RTX 5060 Ti and RTX 4070 I’m looking for help from someone with experience in Unreal Engine rendering, D3D12 and NVIDIA GPU drivers. I’ve been inv… --- ## [DOF blurs away hair strands (groom)](https://forums.unrealengine.com/t/dof-blurs-away-hair-strands-groom/512022)
**Author:** [@rellay1](https://forums.unrealengine.com/u/rellay1)\ **Replies:** 10\ **Last updated:** [November 1, 2026, 2:47am UTC](https://forums.unrealengine.com/t/dof-blurs-away-hair-strands-groom/512022 "2026-11-01T02:47:21Z")
I have these two images, one with the DOF effect, the second one is without. Is there a way to improve DOF so it can catch every detail? The only solution that I’ve found is that Path tracing handles it pretty well.… --- ## [Black Lines](https://forums.unrealengine.com/t/black-lines/2652911)
**Author:** [@J97Harrison](https://forums.unrealengine.com/u/J97Harrison)\ **Replies:** 5\ **Last updated:** [October 31, 2026, 11:30pm UTC](https://forums.unrealengine.com/t/black-lines/2652911 "2026-10-31T23:30:46Z")
I have horizontal black lines across the viewport that only show at certain camera angles. This is in a nearly blank, default project, and happens in other similarly basic projects. Lumen, Nanite, all forms of GI and ref… --- ## [UE 5.1 Jagged Shadows?](https://forums.unrealengine.com/t/ue-5-1-jagged-shadows/787629)
**Author:** [@Venomous\_Films](https://forums.unrealengine.com/u/Venomous_Films)\ **Replies:** 4\ **Last updated:** [October 31, 2026, 12:57am UTC](https://forums.unrealengine.com/t/ue-5-1-jagged-shadows/787629 "2026-10-31T00:57:47Z")
I’ve noticed that certain prop shadows have very razor-jagged shadows. I have virtual shadows on and all other new settings with 5.1 and have zero clue what’s causing this and I feel it really takes you out of the exp… --- ## [Is there any way to use Constrain Aspect Ratio and Aspect Ratio Axis Constraint at the same time?](https://forums.unrealengine.com/t/is-there-any-way-to-use-constrain-aspect-ratio-and-aspect-ratio-axis-constraint-at-the-same-time/2736756)
**Author:** [@UpCastAlex](https://forums.unrealengine.com/u/UpCastAlex)\ **Replies:** 2\ **Last updated:** [October 30, 2026, 4:24am UTC](https://forums.unrealengine.com/t/is-there-any-way-to-use-constrain-aspect-ratio-and-aspect-ratio-axis-constraint-at-the-same-time/2736756 "2026-10-30T04:24:17Z")
Simple as the title implies, is there any way to use Constrain Aspect Ratio and Aspect Ratio Axis Constraint at the same time? By default, the engine will use the “Maintain Y-Axis FOV” when adjusting the window size to … --- ## [Metahuman hair is pitch black in every situation](https://forums.unrealengine.com/t/metahuman-hair-is-pitch-black-in-every-situation/2574242)
**Author:** [@m\_FirstLTest](https://forums.unrealengine.com/u/m_FirstLTest)\ **Replies:** 1\ **Last updated:** [October 29, 2026, 10:38am UTC](https://forums.unrealengine.com/t/metahuman-hair-is-pitch-black-in-every-situation/2574242 "2026-10-29T10:38:58Z")
Hello! There is a strange issue in ue 5.5, when I try to use metahumans the hair looks ugly. Actually This is a brand new project, I imported a metahuman, but as you can see the groom is black, and ugly. It should be gr… --- ## [What's actually the default Normal value in the material graph, when there's no node connected to it?](https://forums.unrealengine.com/t/whats-actually-the-default-normal-value-in-the-material-graph-when-theres-no-node-connected-to-it/258382)
**Author:** [@Ichinose](https://forums.unrealengine.com/u/Ichinose)\ **Replies:** 4\ **Last updated:** [October 28, 2026, 2:54pm UTC](https://forums.unrealengine.com/t/whats-actually-the-default-normal-value-in-the-material-graph-when-theres-no-node-connected-to-it/258382 "2026-10-28T14:54:10Z")
I tried using VertexNormalWS transformed to local space, which works for meshes with unaltered vertex normals. However, it fails when the mesh has altered vertex normals, as VertexNormalWS disregard the alteration. All … --- ## [Smoke Trail](https://forums.unrealengine.com/t/smoke-trail/2846197)
**Author:** [@Ruslanmin2](https://forums.unrealengine.com/u/Ruslanmin2)\ **Replies:** 0\ **Last updated:** [October 28, 2026, 12:42pm UTC](https://forums.unrealengine.com/t/smoke-trail/2846197 "2026-10-28T12:42:24Z")
Hi, Can you please tell me how to create step by step such smoke trails after shooting bullets, smoke disapper after second-two? Some tutorial? Ruslan [Next page](https://forums.unrealengine.com/c/development-discussion/rendering/36.md?page=1)