# GPU Lightmass not working on Landscape **URL:** \ **Category:** Rendering\ **Tags:** unreal-engine\ **Created:** [November 7, 2023, 4:27pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174 "2023-11-07T16:27:12Z")\ **Posts on this page:** 14\ **Page:** 2
**Author:** ![skatebail](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@skatebail](https://forums.unrealengine.com/u/skatebail)\ **Post date:** [January 31, 2024, 9:33pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/21 "2024-01-31T21:33:07Z")
Thank you, worked like a charm! ---
**Author:** ![diddlyDixon](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@diddlyDixon](https://forums.unrealengine.com/u/diddlyDixon)\ **Post date:** [February 17, 2024, 11:41pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/22 "2024-02-17T23:41:22Z")
Hey I upgraded from 5.2 to 5.3 recently and noticed the same issue reported on this forum post. I tried out the patch and it does fix the issue! ---
**Author:** ![EarlSinclair](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/earlsinclair/32/882560_2.png) [@EarlSinclair](https://forums.unrealengine.com/u/EarlSinclair)\ **Post date:** [March 5, 2024, 1:02am UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/23 "2024-03-05T01:02:42Z")
Can confirm it’s working after replacing UnrealEditor-GPULightmass.dll with your version. Thank you so much ! **Before:** ![before_change_dll](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/e/5/2e51b9a1d55f0fa137c27addc5710a19506a2d6c.jpeg) **After:** ![after_change_dll](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/d/3/4d33535e1f6831120e6dfc9a57814cc7f0ec5007.jpeg) ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [March 5, 2024, 1:04pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/24 "2024-03-05T13:04:41Z")
hi @EarlSinclair , Thanks for testing. It was a small change, but it means a lot that people are happy with the work😁 ---
**Author:** ![TheWOWStudio](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TheWOWStudio](https://forums.unrealengine.com/u/TheWOWStudio)\ **Post date:** [March 15, 2024, 12:21pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/25 "2024-03-15T12:21:23Z")
Hey! The patch fixed a bunch, thanks for that! The only issue I’m experiencing when baking is that the landscape does not cast a shadow on itself. Do you have the same issue? UE 5.2.1: ![Schermafbeelding 2024-03-15 131110](https://d3kjluh73b9h9o.cloudfront.net/original/4X/d/5/b/d5b37fd91634d59cc578a02da29303887d442d1c.jpeg) UE 5.3.2: ![Schermafbeelding 2024-03-15 131134](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/3/8/738c27ba23102f054edbef9d170d23a81bb09e17.jpeg) ---
**Author:** ![Sherry\_Xxx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Sherry\_Xxx](https://forums.unrealengine.com/u/Sherry_Xxx)\ **Post date:** [April 2, 2024, 2:05pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/26 "2024-04-02T14:05:12Z")
Hi there， I download Luoshuangs GPU Lightmass (LGPU) 5.3 patch and replace files like read me said. However, it didn’t work. I use 5.3.2 ![微信截图_20240402182620](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/3/f/73f14398974e0323429b2a817178903eda5fc40c.jpeg) ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [April 2, 2024, 3:36pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/27 "2024-04-02T15:36:18Z")
Hi @Sherry_Xxx , I think you probably should have loaded the EPIC GPU Lightmass patches [EpicGPULightMass Landscape 5.3.2 Patch/README.md](https://github.com/jimshalo10/EpicGPULightMassPatch/blob/main/README.md) This will fix the picture above. The patch you have loaded is for baking using Nvidia code directly on the GPU. Epic GPU Lightmass require at least a Nvidia RTX2010 onward or AMD 5000 and uses direct x 12 shaders 6.1 extensions and Windows 10 **NOT Windows 11(eleven)** ---
**Author:** ![Sherry\_Xxx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Sherry\_Xxx](https://forums.unrealengine.com/u/Sherry_Xxx)\ **Post date:** [April 4, 2024, 2:12pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/28 "2024-04-04T14:12:35Z")
It works ---
**Author:** ![Sherry\_Xxx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Sherry\_Xxx](https://forums.unrealengine.com/u/Sherry_Xxx)\ **Post date:** [April 4, 2024, 2:12pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/29 "2024-04-04T14:12:45Z")
thank you ---
**Author:** ![michel.chafouin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@michel.chafouin](https://forums.unrealengine.com/u/michel.chafouin)\ **Post date:** [July 28, 2024, 2:53am UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/30 "2024-07-28T02:53:21Z")
Using Unreal 5.4.3 here, and GPU Lightmass renders Landscape fine, but there is no light bounce from it. It looks like it uses a black albedo during baking instead of the landscape material. It works fine with CPU lightmass. Does anyone have the same problem? ---
**Author:** ![michel.chafouin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@michel.chafouin](https://forums.unrealengine.com/u/michel.chafouin)\ **Post date:** [July 31, 2024, 11:30am UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/31 "2024-07-31T11:30:25Z")
Correction, it’s not just using incorrect albedo, it’s actually not occluding any other meshes either. It receives lighting but doesn’t affect lighting, only with GPU lightmass. ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [July 31, 2024, 1:11pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/32 "2024-07-31T13:11:34Z")
hi @michel.chafouin , You better off moving this question to [Epic’s GPUlightmass - Development / Rendering - Epic Developer Community Forums (unrealengine.com)](https://forums.unrealengine.com/t/epics-gpulightmass/139357) My real expertise is in [Luoshuang’s GPULightmass Unreal Engine 5.4.3 patch](https://forums.unrealengine.com/t/luoshuang-s-gpulightmass-unreal-engine-5-4-3-patch/1905932) ---
**Author:** ![michel.chafouin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@michel.chafouin](https://forums.unrealengine.com/u/michel.chafouin)\ **Post date:** [July 31, 2024, 1:25pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/33 "2024-07-31T13:25:21Z")
Thanks, I will. Just FYI, I did try with LGPU and got the same results. ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [July 31, 2024, 1:36pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174/34 "2024-07-31T13:36:31Z")
Hi @michel.chafouin , That is because the CUDA code has to be compatible with GPU is UE4 [Previous page](https://forums.unrealengine.com/t/gpu-lightmass-not-working-on-landscape/1371174.md?page=1)