# \#lighting-problem **URL:** https://forums.unrealengine.com/tag/lighting-problem/1572.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [The shadows in the shader are blue](https://forums.unrealengine.com/t/the-shadows-in-the-shader-are-blue/2853086)
**Author:** [@Whyskash](https://forums.unrealengine.com/u/Whyskash)\ **Replies:** 6\ **Last updated:** [November 12, 2026, 2:59pm UTC](https://forums.unrealengine.com/t/the-shadows-in-the-shader-are-blue/2853086 "2026-11-12T14:59:12Z")
For some reason every object I have has a bllue shadow underneath that ignores the cel shading: Preview: Scene: --- ## [Twinmotion 2025.2 vs 2026.2 Preview: SketchUp models not loading, crashes on lighting, FBX and Nanite issues — requesting help with diagnostics](https://forums.unrealengine.com/t/twinmotion-2025-2-vs-2026-2-preview-sketchup-models-not-loading-crashes-on-lighting-fbx-and-nanite-issues-requesting-help-with-diagnostics/2845054)
**Author:** [@Bananadelfin\_123](https://forums.unrealengine.com/u/Bananadelfin_123)\ **Replies:** 0\ **Last updated:** [October 25, 2026, 5:24pm UTC](https://forums.unrealengine.com/t/twinmotion-2025-2-vs-2026-2-preview-sketchup-models-not-loading-crashes-on-lighting-fbx-and-nanite-issues-requesting-help-with-diagnostics/2845054 "2026-10-25T17:24:08Z")
Hi everyone! I need help diagnosing critical issues in Twinmotion that make work impossible; support hasn’t responded yet. I’ve collected maximum data, logs, and clear reproduction steps, plus compared behavior across tw… --- ## [UE5 Emissive materials not casting light](https://forums.unrealengine.com/t/ue5-emissive-materials-not-casting-light/507130)
**Author:** [@Przemek73](https://forums.unrealengine.com/u/Przemek73)\ **Replies:** 11\ **Last updated:** [October 12, 2026, 1:40pm UTC](https://forums.unrealengine.com/t/ue5-emissive-materials-not-casting-light/507130 "2026-10-12T13:40:36Z")
I’m trying to do an emissive LED light pipe in a car that is hidden between the door panel and a grab handle. The problem is that when you see the light source all is fine, but when you hide it out of view it should stil… --- ## [Motion Blur and Smearing on Assets In Motion](https://forums.unrealengine.com/t/motion-blur-and-smearing-on-assets-in-motion/2832794)
**Author:** [@User-31e3dcabf2](https://forums.unrealengine.com/u/User-31e3dcabf2)\ **Replies:** 3\ **Last updated:** [September 21, 2026, 2:32pm UTC](https://forums.unrealengine.com/t/motion-blur-and-smearing-on-assets-in-motion/2832794 "2026-09-21T14:32:40Z")
I have 2 issues happening here that I am hoping someone can help me. One issue is with geometry collections. In the video linked here, I have some assets that turn into geometry collections. When the geometry collection… --- ## [Groom asset with reflection problem ](https://forums.unrealengine.com/t/groom-asset-with-reflection-problem/2756220)
**Author:** [@mbythestar](https://forums.unrealengine.com/u/mbythestar)\ **Replies:** 2\ **Last updated:** [September 8, 2026, 10:01am UTC](https://forums.unrealengine.com/t/groom-asset-with-reflection-problem/2756220 "2026-09-08T10:01:24Z")
Hello guys I have a problem for months now with groom asset in unreal. When my groom is in level, any levels (even calibrated one, good lighting value, etc..) my groom reflects the whole environment. Im working in lume… --- ## [No indirect lighting baked CPU Lightmass 5.7.1 and 5.6.1](https://forums.unrealengine.com/t/no-indirect-lighting-baked-cpu-lightmass-5-7-1-and-5-6-1/2689636)
**Author:** [@SStoytchev](https://forums.unrealengine.com/u/SStoytchev)\ **Replies:** 6\ **Last updated:** [September 5, 2026, 1:25pm UTC](https://forums.unrealengine.com/t/no-indirect-lighting-baked-cpu-lightmass-5-7-1-and-5-6-1/2689636 "2026-09-05T13:25:41Z")
Hi, anyone having issues baking lights? I’ve been spending two days on this, trying all kinds of solutions, but nothing works. I’m basically getting no Global Illumination, only the direct lighting is getting baked. I re… --- ## [Ребилд Света](https://forums.unrealengine.com/t/topic/2721723)
**Author:** [@Tigran\_Aryan](https://forums.unrealengine.com/u/Tigran_Aryan)\ **Replies:** 1\ **Last updated:** [July 21, 2026, 2:36pm UTC](https://forums.unrealengine.com/t/topic/2721723 "2026-07-21T14:36:40Z")
Движок постоянно требует ребилд света на уровнях но не делает перешет. Закрытый цикл требований которые сам не исполняет. Работаю на Mac Studio М4 для VR на PICO 4 Ultra. Подскажите пожалуйста как с этим справиться? --- ## [Not all light sources are baked ](https://forums.unrealengine.com/t/not-all-light-sources-are-baked/2733765)
**Author:** [@AlkeyXXX](https://forums.unrealengine.com/u/AlkeyXXX)\ **Replies:** 1\ **Last updated:** [July 8, 2026, 1:43pm UTC](https://forums.unrealengine.com/t/not-all-light-sources-are-baked/2733765 "2026-07-08T13:43:32Z")
I have a level containing only a Skylight (set to Stationary with “Cast Shadows” disabled). Additionally, there are 36 Blueprints in the scene; each consists of a single wall mesh and two Point Lights. In total, there … --- ## [Moving Objects Leave Behind A Trail In Shadows](https://forums.unrealengine.com/t/moving-objects-leave-behind-a-trail-in-shadows/2732398)
**Author:** [@User-31e3dcabf2](https://forums.unrealengine.com/u/User-31e3dcabf2)\ **Replies:** 1\ **Last updated:** [June 30, 2026, 12:49am UTC](https://forums.unrealengine.com/t/moving-objects-leave-behind-a-trail-in-shadows/2732398 "2026-06-30T00:49:28Z")
This issue only happens inside of a shaded area. When either myself or an asset move inside of a shaded area, they leave behind a trail. It looks almost like when an image gets burnt into a computer screen. It does not h… --- ## [Square Artifacts at edges of Area Lights](https://forums.unrealengine.com/t/square-artifacts-at-edges-of-area-lights/2726335)
**Author:** [@Vedoxox](https://forums.unrealengine.com/u/Vedoxox)\ **Replies:** 0\ **Last updated:** [June 4, 2026, 8:29pm UTC](https://forums.unrealengine.com/t/square-artifacts-at-edges-of-area-lights/2726335 "2026-06-04T20:29:36Z")
Hey everybody! got a XR project on 5.7.4 and running into this interesting rendering behavior. there are square tile artifacts that appear to be relative to screen space and are present on the edges of area lights and al… --- ## [Lighting passing through wall](https://forums.unrealengine.com/t/lighting-passing-through-wall/477653)
**Author:** [@biglightii](https://forums.unrealengine.com/u/biglightii)\ **Replies:** 3\ **Last updated:** [May 1, 2026, 3:18pm UTC](https://forums.unrealengine.com/t/lighting-passing-through-wall/477653 "2026-05-01T15:18:33Z")
Hello, i’m just trying to make interior scene like strong casting light, but i found the lighting passing through wall, i tried black wall but its not fixing… if you know solutions, please let me know! Thank you 3… --- ## [Light through wall](https://forums.unrealengine.com/t/light-through-wall/489337)
**Author:** [@srhrs](https://forums.unrealengine.com/u/srhrs)\ **Replies:** 4\ **Last updated:** [May 1, 2026, 3:14pm UTC](https://forums.unrealengine.com/t/light-through-wall/489337 "2026-05-01T15:14:27Z")
Hi, I’m having a problem with a stationary directional light on stationary mesh and I’m unable to fix it. Light filters through the wall, but only one; others don’t have the same problem even with the same exposure. The… --- ## [Substance 3D Materials Not Reflecting Light Properly](https://forums.unrealengine.com/t/substance-3d-materials-not-reflecting-light-properly/2718611)
**Author:** [@Rain\_Pro\_Pixel](https://forums.unrealengine.com/u/Rain_Pro_Pixel)\ **Replies:** 0\ **Last updated:** [April 28, 2026, 3:53pm UTC](https://forums.unrealengine.com/t/substance-3d-materials-not-reflecting-light-properly/2718611 "2026-04-28T15:53:40Z")
\[Bug\] SBSAR Material UV Rotation Couples to Normal Map / Tangent Space — Lighting Rotates With Material, Brightness Varies With Angle (Twinmotion 2026.1) Summary When a Substance 3D .sbsar material is applied to a surfac… --- ## [(5.6.1) Light function Material stops working when level starts, then remains off when exiting. ](https://forums.unrealengine.com/t/5-6-1-light-function-material-stops-working-when-level-starts-then-remains-off-when-exiting/2717475)
**Author:** [@Celestial\_Scythe](https://forums.unrealengine.com/u/Celestial_Scythe)\ **Replies:** 0\ **Last updated:** [April 23, 2026, 2:59pm UTC](https://forums.unrealengine.com/t/5-6-1-light-function-material-stops-working-when-level-starts-then-remains-off-when-exiting/2717475 "2026-04-23T14:59:06Z")
So I have a scene that has a light function material to create a flickering light effect. I use the same material for the emission on the object. When I first open the project, I can see the effect and it seems to functi… --- ## [Light leaking through mesh imported from Maya (UE5) ](https://forums.unrealengine.com/t/light-leaking-through-mesh-imported-from-maya-ue5/2713418)
**Author:** [@XIIRod](https://forums.unrealengine.com/u/XIIRod)\ **Replies:** 4\ **Last updated:** [April 20, 2026, 6:02am UTC](https://forums.unrealengine.com/t/light-leaking-through-mesh-imported-from-maya-ue5/2713418 "2026-04-20T06:02:58Z")
Hey everyone, I’m having some trouble with light leaking on a model I exported from Maya as an FBX. Texturing went fine, but I’m seeing light hitting areas that should be completely dark. I’m pretty new to Unreal and I… --- ## [Rect Lights - barns not working on static lights - ies profile not working](https://forums.unrealengine.com/t/rect-lights-barns-not-working-on-static-lights-ies-profile-not-working/509469)
**Author:** [@geverk](https://forums.unrealengine.com/u/geverk)\ **Replies:** 4\ **Last updated:** [April 2, 2026, 7:27pm UTC](https://forums.unrealengine.com/t/rect-lights-barns-not-working-on-static-lights-ies-profile-not-working/509469 "2026-04-02T19:27:11Z")
Hi, I have noticed that Rect lights do not work properly when you assign a IES profile, it becomes a punctual light. So I tried to emulate the effect using the barn angle and length but those options only work on stati… --- ## [No GI Bounces on baked lighting](https://forums.unrealengine.com/t/no-gi-bounces-on-baked-lighting/570770)
**Author:** [@Courvee](https://forums.unrealengine.com/u/Courvee)\ **Replies:** 18\ **Last updated:** [March 30, 2026, 3:01pm UTC](https://forums.unrealengine.com/t/no-gi-bounces-on-baked-lighting/570770 "2026-03-30T15:01:21Z")
Hi! I have been working in Unreal for many years, but this is the first time I have encountered such a problem. When I bake the light, there are no bounces at all. Everything you need is marked with static, everythin… --- ## [Enabling Megalight causes shadow issues when rotating camera](https://forums.unrealengine.com/t/enabling-megalight-causes-shadow-issues-when-rotating-camera/2458292)
**Author:** [@DenSevSev](https://forums.unrealengine.com/u/DenSevSev)\ **Replies:** 5\ **Last updated:** [March 28, 2026, 12:52am UTC](https://forums.unrealengine.com/t/enabling-megalight-causes-shadow-issues-when-rotating-camera/2458292 "2026-03-28T00:52:51Z")
Enabling Megalights to my post process volume causes wierd dark splotches to appear and leak/fade out when rotating and moving the camera. Anyone else have this issue? It only appears in dark/shadowed areas of the scene. … --- ## [Too many overlapping shadowed movable lights, Shadow casting disabled: DirectionalLight](https://forums.unrealengine.com/t/too-many-overlapping-shadowed-movable-lights-shadow-casting-disabled-directionallight/463243)
**Author:** [@SingleCoreStudios](https://forums.unrealengine.com/u/SingleCoreStudios)\ **Replies:** 6\ **Last updated:** [March 21, 2026, 1:23am UTC](https://forums.unrealengine.com/t/too-many-overlapping-shadowed-movable-lights-shadow-casting-disabled-directionallight/463243 "2026-03-21T01:23:13Z")
PLEASE HELP I have this annoying message that won’t go away no matter what: Too many overlapping shadowed movable lights, Shadow casting disabled: DirectionalLight I am 99% sure I have gone one by one on each of my mo… --- ## [Spotlight dissapears on edge of screen.](https://forums.unrealengine.com/t/spotlight-dissapears-on-edge-of-screen/2704081)
**Author:** [@hwpixo](https://forums.unrealengine.com/u/hwpixo)\ **Replies:** 1\ **Last updated:** [March 6, 2026, 7:59am UTC](https://forums.unrealengine.com/t/spotlight-dissapears-on-edge-of-screen/2704081 "2026-03-06T07:59:13Z")
Hi all, I am having this weird issue that the light from the spotlight I have in the scene keeps dissapearing at the edges of the camera view. This is happening either with just the viewport camera view or inside a cinec… --- ## [Certain static lights not casting light on actors ](https://forums.unrealengine.com/t/certain-static-lights-not-casting-light-on-actors/2702790)
**Author:** [@MonsterDogmeat](https://forums.unrealengine.com/u/MonsterDogmeat)\ **Replies:** 6\ **Last updated:** [March 4, 2026, 11:56pm UTC](https://forums.unrealengine.com/t/certain-static-lights-not-casting-light-on-actors/2702790 "2026-03-04T23:56:46Z")
After combing through what i could, and I cant seem to find anyone else with this issue. Im here. In my world, i have static, baked lights casting lights and shadows on actors and my sprites. No Lumen, no Nanite + Virtu… --- ## [Baked Lights look awfully bad](https://forums.unrealengine.com/t/baked-lights-look-awfully-bad/2696076)
**Author:** [@Divyanshu](https://forums.unrealengine.com/u/Divyanshu)\ **Replies:** 6\ **Last updated:** [March 3, 2026, 5:19pm UTC](https://forums.unrealengine.com/t/baked-lights-look-awfully-bad/2696076 "2026-03-03T17:19:15Z")
Hey, I am new to game development, I used to get very less fps when I used stationary lights then I got to know I am supposed to make all the lights of my horror game static and build light accordingly, but the baked li… --- ## [Flickering on Movable Lights](https://forums.unrealengine.com/t/flickering-on-movable-lights/2701548)
**Author:** [@Abdulloh\_3D](https://forums.unrealengine.com/u/Abdulloh_3D)\ **Replies:** 1\ **Last updated:** [February 24, 2026, 3:09pm UTC](https://forums.unrealengine.com/t/flickering-on-movable-lights/2701548 "2026-02-24T15:09:00Z")
Hello everyone! In UE 5.2 and 5.3, when changing all lights from Static to Movable, flickering occurs. Static lights don’t flicker. I turn the lights on and off during animation, so I changed them to Movable. Do you hav… --- ## [Ctrl + L does not work UE5 (Unreal Engine 5)](https://forums.unrealengine.com/t/ctrl-l-does-not-work-ue5-unreal-engine-5/519167)
**Author:** [@anonymous\_user\_e4d19659](https://forums.unrealengine.com/u/anonymous_user_e4d19659)\ **Replies:** 39\ **Last updated:** [February 19, 2026, 5:49pm UTC](https://forums.unrealengine.com/t/ctrl-l-does-not-work-ue5-unreal-engine-5/519167 "2026-02-19T17:49:07Z")
I’m taking a course from Epic Games called “Your First Game in UE5”. Got to the point where the author says you need to press Ctrl + L to start rotate the light, but I have this combination does not work. I checked sever… --- ## [Lighting Cinematic Tool 1.0 - Official Release (Free for 2 Weeks)](https://forums.unrealengine.com/t/lighting-cinematic-tool-1-0-official-release-free-for-2-weeks/2698494)
**Author:** [@Argentum\_Studio](https://forums.unrealengine.com/u/Argentum_Studio)\ **Replies:** 2\ **Last updated:** [February 9, 2026, 2:33pm UTC](https://forums.unrealengine.com/t/lighting-cinematic-tool-1-0-official-release-free-for-2-weeks/2698494 "2026-02-09T14:33:14Z")
Lighting Cinematic Tool 1.0 - Official Release (Free for 2 Weeks) Hi everyone, we’re happy to share the release of our new tool for Unreal Engine cinematics - Lighting Cinematic Tool. FAB Release UE5.5+ Lighting Cinem… --- ## [Light going through walls](https://forums.unrealengine.com/t/light-going-through-walls/2696930)
**Author:** [@Ryd3r09](https://forums.unrealengine.com/u/Ryd3r09)\ **Replies:** 10\ **Last updated:** [February 4, 2026, 12:28am UTC](https://forums.unrealengine.com/t/light-going-through-walls/2696930 "2026-02-04T00:28:49Z")
Hello I am working on a level for my game and adding ceiling lights to the building. How do i stop the light from going through the ceiling and walls. Ive tried checking two sided lighting but that didnt work. I am usin… --- ## [Blown out Colors](https://forums.unrealengine.com/t/blown-out-colors/2694262)
**Author:** [@Bushwookie69](https://forums.unrealengine.com/u/Bushwookie69)\ **Replies:** 1\ **Last updated:** [January 23, 2026, 7:14pm UTC](https://forums.unrealengine.com/t/blown-out-colors/2694262 "2026-01-23T19:14:07Z")
I have a issue with my lighting in my level. My ninjas smoke should be a dark grey/black fade but its more Light grey/white almost. Then my turrets and barricades have health bars that are green on top but they are so bl… --- ## [Issue with pixelated specular on mesh edges](https://forums.unrealengine.com/t/issue-with-pixelated-specular-on-mesh-edges/2694167)
**Author:** [@Data\_Vision](https://forums.unrealengine.com/u/Data_Vision)\ **Replies:** 0\ **Last updated:** [January 22, 2026, 4:29pm UTC](https://forums.unrealengine.com/t/issue-with-pixelated-specular-on-mesh-edges/2694167 "2026-01-22T16:29:22Z")
I’ve been having this issue and i’m not sure what causes it but it’s a pain point for me (automotive rendering). When lighting the car parts, i get these pixelated issues on mesh edges, that get smoothed out by antialia… --- ## [Lighting inside walls](https://forums.unrealengine.com/t/lighting-inside-walls/2684954)
**Author:** [@prod.alyx](https://forums.unrealengine.com/u/prod.alyx)\ **Replies:** 6\ **Last updated:** [December 17, 2025, 1:24am UTC](https://forums.unrealengine.com/t/lighting-inside-walls/2684954 "2025-12-17T01:24:51Z")
Summary When u build a box or a building whatever , inside it it will be NO LIGHT like u turned off lightning but its on in world settings, in game it looks fine but inside uefn u cant build environments wherm theres no … --- ## [Ceiling appears darker than walls but have the same material](https://forums.unrealengine.com/t/ceiling-appears-darker-than-walls-but-have-the-same-material/620661)
**Author:** [@knabilrazik](https://forums.unrealengine.com/u/knabilrazik)\ **Replies:** 15\ **Last updated:** [December 1, 2025, 6:21am UTC](https://forums.unrealengine.com/t/ceiling-appears-darker-than-walls-but-have-the-same-material/620661 "2025-12-01T06:21:47Z")
Hi everyone, I am using lumen and I just started you using unreal engine. (So I am a beginner ) I am working on a small villa. as attached I saw a couple of people posted almost the same post, but there wasn’t an… [Next page](https://forums.unrealengine.com/tag/lighting-problem/1572.md?match_all_tags=true&page=1&tags%5B%5D=lighting-problem)