# Luoshuang's GPULightmass **URL:** \ **Category:** Rendering\ **Tags:** unreal-engine\ **Created:** [April 13, 2018, 5:44am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474 "2018-04-13T05:44:47Z")\ **Posts on this page:** 20\ **Page:** 54
**Author:** ![Vrender](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Vrender](https://forums.unrealengine.com/u/Vrender)\ **Post date:** [April 5, 2019, 1:32pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1102 "2019-04-05T13:32:07Z")
Hi Guys, What is Prometheus? How it’s work? And tell me please GPULightmass supports SLI Technology? ---
**Author:** ![DsyD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DsyD](https://forums.unrealengine.com/u/DsyD)\ **Post date:** [April 5, 2019, 2:01pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1103 "2019-04-05T14:01:58Z")
It doesn’t use SLI, none of the offline GPU renderers do. Also I think it is limited to only 1 GPU at the moment. ---
**Author:** ![alpinrage](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@alpinrage](https://forums.unrealengine.com/u/alpinrage)\ **Post date:** [April 5, 2019, 6:04pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1104 "2019-04-05T18:04:00Z")
Stange. I installed Prometheus 4.22 same process as GPULightmass and it dont work. Swarm agent starts and Gpu window doesnt open. 1080ti, 419,64 driver. GPULightmass 4.21 works perfectly. ---
**Author:** ![ldo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ldo](https://forums.unrealengine.com/u/ldo)\ **Post date:** [April 6, 2019, 5:56pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1105 "2019-04-06T17:56:37Z")
> [@alpinrage](#): > > Stange. I installed Prometheus 4.22 same process as GPULightmass and it dont work. Swarm agent starts and Gpu window doesnt open. 1080ti, 419,64 driver. GPULightmass 4.21 works perfectly. As I see there is no Progress Bar for Prometheus right now, watch Swarm Agent Log. I hope \*\* \*\*will add it later, because custom GPULM progress bar is more accurate in term of time left for baking. ---
**Author:** ![ldo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ldo](https://forums.unrealengine.com/u/ldo)\ **Post date:** [April 6, 2019, 8:44pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1106 "2019-04-06T20:44:04Z")
, during the test I discovered some strange issue with using of Prometheus. Middle face of the door frame was baked incorrect. Here are 3 screenshots of both GPULM and Prometheus captured from the same position. Prometheus bake look too dark in compare to GPULM. I can send you this simple scene for investigating if need. Prometheus…GPULM ![HighresScreenshot00003_2048x1152.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/3X/d/f/df04c3c598c91b6100fde7ea34d81da3c5c35b05.jpeg) Prometheus…GPULM ![HighresScreenshot00004_2048x1152.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/3X/8/7/87e8dc41ef23178927eae573a8073e4631a3aa37.jpeg) Prometheus…GPULM ![HighresScreenshot00005_2048x1152.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/3X/7/d/7d82b521d957141abdd7be185468c6199f6356c6.jpeg) ![2.JPG](https://d3kjluh73b9h9o.cloudfront.net/original/3X/3/f/3f1963e9b48295a4a27865c5c03b829026c62e61.jpeg) ---
**Author:** ![Luoshuang](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Luoshuang](https://forums.unrealengine.com/u/Luoshuang)\ **Post date:** [April 6, 2019, 9:11pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1107 "2019-04-06T21:11:56Z")
> [@ldo](#): > > I can send you this simple scene for investigating if need. Would be very helpful. Thanks! EDIT: If possible can you provide a 4.21 version so that I can compare it to VRay? ---
**Author:** ![Saturndj](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Saturndj](https://forums.unrealengine.com/u/Saturndj)\ **Post date:** [April 7, 2019, 12:00am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1108 "2019-04-07T00:00:11Z")
Hi Great job what I see around here, but you could help me explain step by step what I should do to use your prometheus- uvtesting-0.1.0 in unreal 4.21.2 Is it just overwriting the files with prometheus? In unreal, should I change anything? I’m waiting for your help, thanks. ---
**Author:** ![leducvu](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@leducvu](https://forums.unrealengine.com/u/leducvu)\ **Post date:** [April 8, 2019, 3:25am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1109 "2019-04-08T03:25:06Z")
Hi everyone, does RTX card support Loushang GPULM now? ---
**Author:** ![Situx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Situx](https://forums.unrealengine.com/u/Situx)\ **Post date:** [April 8, 2019, 7:06pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1110 "2019-04-08T19:06:35Z")
> [@Christophe.R](#): > > Hi everyone, > > We updated the Situx installer to make it compatible with the new version 4.22 of GPULightmass. > , we just sent you a Pull Request on . > We tested it quickly and everything seems to be working for us. > > A very big thank you to Samuel who made this update on his lunchtime! Thank you! I approved the pull request last Friday, but forgot to merge the changes! 🙂 It’s done now, merged and tested. Thanks Samuel again! ---
**Author:** ![DsyD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DsyD](https://forums.unrealengine.com/u/DsyD)\ **Post date:** [April 8, 2019, 7:18pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1111 "2019-04-08T19:18:08Z")
Hi, does anyone know if GPU Lightmass makes use of portal lights? I saw that this was asked a couple times in the thread, but apparently no response. Just wondering if I should take the time to place portals for interior scenes, or if it won’t make any difference… ---
**Author:** ![ZacD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ZacD](https://forums.unrealengine.com/u/ZacD)\ **Post date:** [April 8, 2019, 7:55pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1112 "2019-04-08T19:55:49Z")
It doesn’t use portals. ---
**Author:** ![DsyD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DsyD](https://forums.unrealengine.com/u/DsyD)\ **Post date:** [April 8, 2019, 11:53pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1113 "2019-04-08T23:53:59Z")
Great, thanks 🙂 ---
**Author:** ![motorsep](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/motorsep/32/918698_2.png) [@motorsep](https://forums.unrealengine.com/u/motorsep)\ **Post date:** [April 9, 2019, 1:54am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1114 "2019-04-09T01:54:56Z")
> [@ZacD](#): > > It doesn’t use portals. Why doesn’t it use portals ? ---
**Author:** ![wageh](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/wageh/32/723186_2.png) [@wageh](https://forums.unrealengine.com/u/wageh)\ **Post date:** [April 9, 2019, 12:36pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1115 "2019-04-09T12:36:02Z")
- It works with 4.21, but can easily be adapted for 4.20x and 4.19.x if needed by adjusting a few parameters inside the file (just edit with Notepad and change UnrealVersion variable to 4.20 or 4.19. - i don t know where i should edit to work on version 4.21.2 ? - please define this point clearly ---
**Author:** ![aka.prime](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@aka.prime](https://forums.unrealengine.com/u/aka.prime)\ **Post date:** [April 9, 2019, 7:03pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1116 "2019-04-09T19:03:54Z")
Hello Guys how can i get rid of this problem? ---
**Author:** ![anonymous\_user\_81a6091a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_81a6091a](https://forums.unrealengine.com/u/anonymous_user_81a6091a)\ **Post date:** [April 9, 2019, 9:24pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1117 "2019-04-09T21:24:18Z")
> [@Situx](#): > > Thank you! I approved the pull request last Friday, but forgot to merge the changes! 🙂 It’s done now, merged and tested. Thanks Samuel again! Thank you all for doing such great work. I need to reinstall 4.21 - where I can find script for 4.21 again. thank you ---
**Author:** ![samdax](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@samdax](https://forums.unrealengine.com/u/samdax)\ **Post date:** [April 10, 2019, 8:38am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1118 "2019-04-10T08:38:59Z")
Where i can download the prometheus test version? i only found the 4.22 lightmass in the first page Thanks! 🙂 ---
**Author:** ![Bakikibakibabaki](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bakikibakibabaki](https://forums.unrealengine.com/u/Bakikibakibabaki)\ **Post date:** [April 10, 2019, 1:22pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1119 "2019-04-10T13:22:52Z")
> [@samdax](#): > > Where i can download the prometheus test version? i only found the 4.22 lightmass in the first page > > Thanks! 🙂 [https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass/page65](https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass/page65) ---
**Author:** ![samdax](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@samdax](https://forums.unrealengine.com/u/samdax)\ **Post date:** [April 10, 2019, 1:38pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1120 "2019-04-10T13:38:59Z")
> [@Bakikibakibabaki](#): > > [https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass/page65](https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass/page65) Thank you 🙂 ---
**Author:** ![whooosh](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@whooosh](https://forums.unrealengine.com/u/whooosh)\ **Post date:** [April 12, 2019, 3:52pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1122 "2019-04-12T15:52:11Z")
What is the stipulation on the licensing for company use? Could we obtain a license? Or could this be under MIT or GPL? Thanks! [Previous page](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474.md?page=53) [Next page](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474.md?page=55)