# \#light **URL:** https://forums.unrealengine.com/tag/light/960.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [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… --- ## [Lumen And SceneCapture2D (UE5)](https://forums.unrealengine.com/t/lumen-and-scenecapture2d-ue5/2711389)
**Author:** [@Nizami\_Nz](https://forums.unrealengine.com/u/Nizami_Nz)\ **Replies:** 1\ **Last updated:** [September 9, 2026, 1:42am UTC](https://forums.unrealengine.com/t/lumen-and-scenecapture2d-ue5/2711389 "2026-09-09T01:42:39Z")
If anyone has encountered a problem where SceneCaptureComponent2D displays an incorrect image (without Lumen), here is the solution: Enable Global Illumination Method → Lumen (even if it’s already set in the global se… --- ## [DMX Tech Inside Unreal Engine Used In A Music Video For Shaq(DJ Diesel) & Soltan](https://forums.unrealengine.com/t/dmx-tech-inside-unreal-engine-used-in-a-music-video-for-shaq-dj-diesel-soltan/1265267)
**Author:** [@zhixoworld](https://forums.unrealengine.com/u/zhixoworld)\ **Replies:** 19\ **Last updated:** [June 26, 2026, 1:38am UTC](https://forums.unrealengine.com/t/dmx-tech-inside-unreal-engine-used-in-a-music-video-for-shaq-dj-diesel-soltan/1265267 "2026-06-26T01:38:10Z")
It’s funny how there are so many great technologies inside Unreal Engine and they’re not mainstreamed or well-known among users. Just opening up the Engine Folder alone and looking into the files can help understand how … --- ## [How do I fix the preview icon showing up on all my textures?](https://forums.unrealengine.com/t/how-do-i-fix-the-preview-icon-showing-up-on-all-my-textures/675733)
**Author:** [@GarboJunkie](https://forums.unrealengine.com/u/GarboJunkie)\ **Replies:** 16\ **Last updated:** [June 22, 2026, 5:26pm UTC](https://forums.unrealengine.com/t/how-do-i-fix-the-preview-icon-showing-up-on-all-my-textures/675733 "2026-06-22T17:26:16Z")
Hello, I have looked online for solutions to this issue. Some other posts on the forums mentioned rebuilding my lighting to remove the preview icon from my textures. I tried that amongst other things but none of it work… --- ## [\[Blueprint\] OneLight - Light System](https://forums.unrealengine.com/t/blueprint-onelight-light-system/1608637)
**Author:** [@AndiVR](https://forums.unrealengine.com/u/AndiVR)\ **Replies:** 3\ **Last updated:** [May 9, 2026, 11:55am UTC](https://forums.unrealengine.com/t/blueprint-onelight-light-system/1608637 "2026-05-09T11:55:56Z")
Hi all, i want to present my first Blueprint available in the marketplace. See the showcase video here: OneLight Showcase vimeo OneLight Showcase youtube I developed a blueprint to easier create lighting. It is o… --- ## [Light Visibility Through Glass Objects/Materials](https://forums.unrealengine.com/t/light-visibility-through-glass-objects-materials/866106)
**Author:** [@EvanHammel](https://forums.unrealengine.com/u/EvanHammel)\ **Replies:** 4\ **Last updated:** [April 20, 2026, 9:22am UTC](https://forums.unrealengine.com/t/light-visibility-through-glass-objects-materials/866106 "2026-04-20T09:22:44Z")
Hi there, I’m using 5.2 Preview 2 to test out what’s new in the world of UE Path Tracing. One thing I still don’t see is the ability to turn off light visibility in refractions. In the example here, I have a skylig… --- ## [How to create a light component that controls turning on and off lights casting shadows based on player distance using blueprints?](https://forums.unrealengine.com/t/how-to-create-a-light-component-that-controls-turning-on-and-off-lights-casting-shadows-based-on-player-distance-using-blueprints/2700598)
**Author:** [@Stefan\_9911](https://forums.unrealengine.com/u/Stefan_9911)\ **Replies:** 2\ **Last updated:** [February 26, 2026, 1:54pm UTC](https://forums.unrealengine.com/t/how-to-create-a-light-component-that-controls-turning-on-and-off-lights-casting-shadows-based-on-player-distance-using-blueprints/2700598 "2026-02-26T13:54:28Z")
Hi, I need to control the shadow casting of the movable lights based on player distance from them. My idea was to make a component and add it to the lights I want to control. But as I am not well experienced in stuff lik… --- ## [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… --- ## [Is there a way I can disable the atmospheric sun light for everything but the backgroun?](https://forums.unrealengine.com/t/is-there-a-way-i-can-disable-the-atmospheric-sun-light-for-everything-but-the-backgroun/2693967)
**Author:** [@tcrmnk0118](https://forums.unrealengine.com/u/tcrmnk0118)\ **Replies:** 2\ **Last updated:** [January 22, 2026, 3:15am UTC](https://forums.unrealengine.com/t/is-there-a-way-i-can-disable-the-atmospheric-sun-light-for-everything-but-the-backgroun/2693967 "2026-01-22T03:15:33Z")
Hello there, so basically I have a background with an HDRI and a sky atmosphere. I want to keep the color in the background, but I don’t want it to tint the rest of the actors in my level (it’s tinting them a subtle yell… --- ## [Sun flickering (directional light)](https://forums.unrealengine.com/t/sun-flickering-directional-light/481008)
**Author:** [@GODTonatiuh](https://forums.unrealengine.com/u/GODTonatiuh)\ **Replies:** 10\ **Last updated:** [December 22, 2025, 12:35pm UTC](https://forums.unrealengine.com/t/sun-flickering-directional-light/481008 "2025-12-22T12:35:03Z")
Hi, everyone. Help please to fix next issue. The sun (in the Diractional Light) is flickering when I turn camera to it (in the dev and play modes). PC, Nvidia GeForce 840M, High Perfomance Processor (in the Nvidia Contr… --- ## [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 … --- ## [Issue with realistic lighting in cesium for unreal ](https://forums.unrealengine.com/t/issue-with-realistic-lighting-in-cesium-for-unreal/2674425)
**Author:** [@TBS\_SplAsh](https://forums.unrealengine.com/u/TBS_SplAsh)\ **Replies:** 2\ **Last updated:** [December 2, 2025, 1:27am UTC](https://forums.unrealengine.com/t/issue-with-realistic-lighting-in-cesium-for-unreal/2674425 "2025-12-02T01:27:16Z")
Hi all! I am using cesium for unreal to simulate lunar imagery. Basically, I have created a lunar scene using their tileset, and have a directional light that is at 100000 lux. But the perceived light from my cine camer… --- ## [Play game in viewport and as standalone have wildly different lighting](https://forums.unrealengine.com/t/play-game-in-viewport-and-as-standalone-have-wildly-different-lighting/2672067)
**Author:** [@idks9](https://forums.unrealengine.com/u/idks9)\ **Replies:** 2\ **Last updated:** [November 6, 2025, 8:35pm UTC](https://forums.unrealengine.com/t/play-game-in-viewport-and-as-standalone-have-wildly-different-lighting/2672067 "2025-11-06T20:35:19Z")
Hi. I’m developing a game for a project, but ran into a wall and have been quite lost for the past days. When I play in viewport, my game looks fine, the lighting is exactly what I need it to be, but when i play in stand… --- ## [Light Leaking With Point Lights ](https://forums.unrealengine.com/t/light-leaking-with-point-lights/2669383)
**Author:** [@idks9](https://forums.unrealengine.com/u/idks9)\ **Replies:** 3\ **Last updated:** [October 28, 2025, 7:02pm UTC](https://forums.unrealengine.com/t/light-leaking-with-point-lights/2669383 "2025-10-28T19:02:39Z")
Hi guys. I’m developing a project for school, but ran into a problem. I have these lamp objects that are simply a mesh + a point light, but their lights are leaking through the ceiling onto other rooms (the ceiling is o… --- ## [Assertion failed: InShadingModel \< MSM\_NUM (crash when building lighting)](https://forums.unrealengine.com/t/assertion-failed-inshadingmodel-msm-num-crash-when-building-lighting/592159)
**Author:** [@rolipoli](https://forums.unrealengine.com/u/rolipoli)\ **Replies:** 3\ **Last updated:** [October 28, 2025, 4:02pm UTC](https://forums.unrealengine.com/t/assertion-failed-inshadingmodel-msm-num-crash-when-building-lighting/592159 "2025-10-28T16:02:20Z")
One of my maps crashes every time I try to build lighting, with the error message “Assertion failed: InShadingModel \< MSM\_NUM”. I was wondering if anyone else has run into this issue or has a solution. I’m not sure what… --- ## [City Sample Buildings light of window](https://forums.unrealengine.com/t/city-sample-buildings-light-of-window/662133)
**Author:** [@Snowbeat](https://forums.unrealengine.com/u/Snowbeat)\ **Replies:** 8\ **Last updated:** [October 23, 2025, 1:22am UTC](https://forums.unrealengine.com/t/city-sample-buildings-light-of-window/662133 "2025-10-23T01:22:59Z")
Good morning everyone, I am starting to use this package City Sample Buildings for some buildings, I am wondering how to change the brightness of the windows (night / day), I noticed that a post-process is used but I … --- ## [Random spot of light appearing both in Lumen and Path tracer ](https://forums.unrealengine.com/t/random-spot-of-light-appearing-both-in-lumen-and-path-tracer/2660151)
**Author:** [@pola.k](https://forums.unrealengine.com/u/pola.k)\ **Replies:** 0\ **Last updated:** [September 26, 2025, 1:29pm UTC](https://forums.unrealengine.com/t/random-spot-of-light-appearing-both-in-lumen-and-path-tracer/2660151 "2025-09-26T13:29:59Z")
Hello everyone, when I opened my model in Twinmotion in order to make some renders, I saw a random spot of light on the floor of my model (see attached pictures) and I have no idea how to get rid of it. It appears in Med… --- ## [Sudden FPS Drop, Shadow Depths Spike, and Nanite/LOD Issues ](https://forums.unrealengine.com/t/sudden-fps-drop-shadow-depths-spike-and-nanite-lod-issues/2650391)
**Author:** [@Utsav138](https://forums.unrealengine.com/u/Utsav138)\ **Replies:** 0\ **Last updated:** [August 23, 2025, 10:21pm UTC](https://forums.unrealengine.com/t/sudden-fps-drop-shadow-depths-spike-and-nanite-lod-issues/2650391 "2025-08-23T22:21:14Z")
Hi, I need some help troubleshooting performance issues in my UE5 project. A few days ago I was getting over 60 FPS, but now I’m only seeing around 20–30 FPS even though I haven’t changed any major settings. Here are the… --- ## [Shadows disappear in the build for some of the players in my game](https://forums.unrealengine.com/t/shadows-disappear-in-the-build-for-some-of-the-players-in-my-game/2647346)
**Author:** [@BiaXThePanda1](https://forums.unrealengine.com/u/BiaXThePanda1)\ **Replies:** 4\ **Last updated:** [August 21, 2025, 11:49pm UTC](https://forums.unrealengine.com/t/shadows-disappear-in-the-build-for-some-of-the-players-in-my-game/2647346 "2025-08-21T23:49:47Z")
Hi, this bug never happened to me before in my game. But a player sent me this photo. For me, even with the lowest quality in my game I don’t get this lighting. But there seems to be a issue about their global illuminati… --- ## [When camera moves far away,the spot light volumetric fog disappear.Anybody can help me?](https://forums.unrealengine.com/t/when-camera-moves-far-away-the-spot-light-volumetric-fog-disappear-anybody-can-help-me/507614)
**Author:** [@anonymous\_user\_f05f845a](https://forums.unrealengine.com/u/anonymous_user_f05f845a)\ **Replies:** 4\ **Last updated:** [July 7, 2025, 3:38pm UTC](https://forums.unrealengine.com/t/when-camera-moves-far-away-the-spot-light-volumetric-fog-disappear-anybody-can-help-me/507614 "2025-07-07T15:38:39Z")
When camera moves far away,the spot light volumetric fog disappear.Anybody can help me? --- ## [Reflection and light not working](https://forums.unrealengine.com/t/reflection-and-light-not-working/2577351)
**Author:** [@gelokofofokoleg](https://forums.unrealengine.com/u/gelokofofokoleg)\ **Replies:** 10\ **Last updated:** [June 29, 2025, 5:25am UTC](https://forums.unrealengine.com/t/reflection-and-light-not-working/2577351 "2025-06-29T05:25:04Z")
Hello I’m running into a problem and would like some help. My problem is that my reflections seem to be broken. When ever I look into the reflections there is a lot of black and the objects are not clear. Here is an e… --- ## [Camera darker after Set View Target - why?](https://forums.unrealengine.com/t/camera-darker-after-set-view-target-why/2548492)
**Author:** [@Defedarax1](https://forums.unrealengine.com/u/Defedarax1)\ **Replies:** 2\ **Last updated:** [June 11, 2025, 11:10am UTC](https://forums.unrealengine.com/t/camera-darker-after-set-view-target-why/2548492 "2025-06-11T11:10:31Z")
Hey everyone! I have a simple but annoying issue: when I switch from my Third Person camera to a camera on another Blueprint (laptop) using Set View Target, the image instantly becomes darker. Both cameras have: Exact… --- ## [LOD and Light bake](https://forums.unrealengine.com/t/lod-and-light-bake/2523216)
**Author:** [@Shunitzo](https://forums.unrealengine.com/u/Shunitzo)\ **Replies:** 1\ **Last updated:** [May 24, 2025, 12:59pm UTC](https://forums.unrealengine.com/t/lod-and-light-bake/2523216 "2025-05-24T12:59:11Z")
I have used UE for a few years, but I still can’t comprehend light baking… For some reason LOD 1 to N won’t bake light normaly. LOD 0 looks fine. I use GPU Lightmass, but normal bake gives same results. Any ideas… --- ## [Problem with light source ](https://forums.unrealengine.com/t/problem-with-light-source/2499098)
**Author:** [@Ilux\_In](https://forums.unrealengine.com/u/Ilux_In)\ **Replies:** 1\ **Last updated:** [May 10, 2025, 12:08am UTC](https://forums.unrealengine.com/t/problem-with-light-source/2499098 "2025-05-10T00:08:18Z")
I had a huge problem with my lightning source The problem is very simple… When I switch on all my lights in the room, there is very strange shadow (or light, IDK) in the wardrobe And when I switch OFF all lights,… --- ## [How can i achieve this lightning?](https://forums.unrealengine.com/t/how-can-i-achieve-this-lightning/2493847)
**Author:** [@HorizonNK](https://forums.unrealengine.com/u/HorizonNK)\ **Replies:** 3\ **Last updated:** [May 7, 2025, 3:00pm UTC](https://forums.unrealengine.com/t/how-can-i-achieve-this-lightning/2493847 "2025-05-07T15:00:09Z")
Hello, I was working on a game and examining the lighting of some games, and I found the image I attached. However, I couldn’t manage to achieve this in my own game. How can I do it? For example, I want only atmospheric … --- ## [GPU Lightmass support for RX7000/RDNA3 GPU's](https://forums.unrealengine.com/t/gpu-lightmass-support-for-rx7000-rdna3-gpus/2450307)
**Author:** [@stormergames001](https://forums.unrealengine.com/u/stormergames001)\ **Replies:** 0\ **Last updated:** [April 10, 2025, 9:33pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-support-for-rx7000-rdna3-gpus/2450307 "2025-04-10T21:33:22Z")
My question is simple, what are the known issues/compatibility for GPU lightmass lightmap baking with AMD RX7000/RDNA3 GPU’s? I am using an RX 7900 XTX and I have had zero success with baking light maps through GPU light… --- ## [How to stop spotlight shaft/bloom fading when in close proximity?](https://forums.unrealengine.com/t/how-to-stop-spotlight-shaft-bloom-fading-when-in-close-proximity/2395525)
**Author:** [@Glowingpumpkin](https://forums.unrealengine.com/u/Glowingpumpkin)\ **Replies:** 0\ **Last updated:** [March 17, 2025, 10:30am UTC](https://forums.unrealengine.com/t/how-to-stop-spotlight-shaft-bloom-fading-when-in-close-proximity/2395525 "2025-03-17T10:30:08Z")
I have a level that is only exponential height fog with individual lights. I have a spotlight that creates a wonderful light shaft/ bloom effect from a distance. However, when the player approaches the spotlight, this … --- ## [Lighting getting darker in viewport (on ceiling most) UE 5.5](https://forums.unrealengine.com/t/lighting-getting-darker-in-viewport-on-ceiling-most-ue-5-5/2267248)
**Author:** [@TrafalgarDlaw059](https://forums.unrealengine.com/u/TrafalgarDlaw059)\ **Replies:** 1\ **Last updated:** [March 12, 2025, 3:41am UTC](https://forums.unrealengine.com/t/lighting-getting-darker-in-viewport-on-ceiling-most-ue-5-5/2267248 "2025-03-12T03:41:32Z")
Issue : Sometimes in editor viewport lighting came whatever the lighting I did , sometimes it’s getting darker. If i restart the project then it’s coming correct, not every time but most of the time . it is the same fo… --- ## [Realistic Light Source ](https://forums.unrealengine.com/t/realistic-light-source/2375536)
**Author:** [@zaxeyyy](https://forums.unrealengine.com/u/zaxeyyy)\ **Replies:** 2\ **Last updated:** [March 5, 2025, 1:52am UTC](https://forums.unrealengine.com/t/realistic-light-source/2375536 "2025-03-05T01:52:23Z")
Hi, I am making a project where i need a visible source of light where i can adjust the intensity in candelas as it is kind of simulator. I’ve tried to do it with emissive material but I am not sure how to set it up. I… --- ## [Realistic Light Source](https://forums.unrealengine.com/t/realistic-light-source/2375538)
**Author:** [@zaxeyyy](https://forums.unrealengine.com/u/zaxeyyy)\ **Replies:** 0\ **Last updated:** [March 5, 2025, 1:08am UTC](https://forums.unrealengine.com/t/realistic-light-source/2375538 "2025-03-05T01:08:45Z")
Hi, I am quite new to the Unreal Engine. I am making a project where I need to have a source of light with intensity in candelas - It must be as realistic as possible. The only way I so far saw to do it is with emissiv… [Next page](https://forums.unrealengine.com/tag/light/960.md?match_all_tags=true&page=1&tags%5B%5D=light)