# 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:** 50
**Author:** ![kurylo3d](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/kurylo3d/32/1150889_2.png) [@kurylo3d](https://forums.unrealengine.com/u/kurylo3d)\ **Post date:** [March 21, 2019, 1:01pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1021 "2019-03-21T13:01:22Z")
anyone know if this works with hlods yet? Previously proxy meshes used to cast shadows on stuff… ---
**Author:** ![Luoshuang](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Luoshuang](https://forums.unrealengine.com/u/Luoshuang)\ **Post date:** [March 21, 2019, 4:56pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1022 "2019-03-21T16:56:24Z")
> [@kurylo3d](#): > > anyone know if this works with hlods yet? Previously proxy meshes used to cast shadows on stuff… While the newest testing Prometheus is missing a lot of features, it should work with LOD/HLOD though ---
**Author:** ![Tobe\_Phoenix](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tobe\_Phoenix](https://forums.unrealengine.com/u/Tobe_Phoenix)\ **Post date:** [March 21, 2019, 6:17pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1023 "2019-03-21T18:17:36Z")
Thanks you soooo much for all the work you’ve put into making Unreal Engine a better platform for us design folks. There are a ton of stuff I still do not understand but seeing all the work you have put into it is really inspiring. I just wanted to thank you for your work and dedication, I know you probably don’t hear that a lot. God bless you man and thanks for inspiring all of us newbies. ---
**Author:** ![DsyD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DsyD](https://forums.unrealengine.com/u/DsyD)\ **Post date:** [March 21, 2019, 6:53pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1024 "2019-03-21T18:53:03Z")
Hi Luoshang - Do you have any ideas on what might be going on with stationary vs. static skylights in my post here? [Luoshuang's GPULightmass - #989 by DsyD - Rendering - Epic Developer Community Forums](https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass?p=1592618#post1592618) The scene has a sky sphere but with shadows turned off - not sure why the stationary skylight version seems ok but the static version doesn’t? I thought skylights were always treated as static… ---
**Author:** ![Luoshuang](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Luoshuang](https://forums.unrealengine.com/u/Luoshuang)\ **Post date:** [March 21, 2019, 7:46pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1025 "2019-03-21T19:46:30Z")
> [@DsyD](#): > > Hi Luoshang - Do you have any ideas on what might be going on with stationary vs. static skylights in my post here? [https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass?p=1592618#post1592618](https://forums.unrealengine.com/development-discussion/rendering/1460002--s-gpulightmass?p=1592618#post1592618) > > The scene has a sky sphere but with shadows turned off - not sure why the stationary skylight version seems ok but the static version doesn’t? I thought skylights were always treated as static… I have no idea about the problem ☹ my code does exactly i said, treating all stationary skylights as static ---
**Author:** ![AE\_3DFX](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ae_3dfx/32/1194637_2.png) [@AE\_3DFX](https://forums.unrealengine.com/u/AE_3DFX)\ **Post date:** [March 21, 2019, 7:53pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1026 "2019-03-21T19:53:15Z")
: Hello, do you have any info what speed upgrades official Lightmass will get? Maybe i am just blind and missed info but i have not found any solid info what exactly Ligmtmass in future gets(in layman’s terms)? ---
**Author:** ![dustintinkler](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/dustintinkler/32/484961_2.png) [@dustintinkler](https://forums.unrealengine.com/u/dustintinkler)\ **Post date:** [March 21, 2019, 9:22pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1027 "2019-03-21T21:22:44Z")
Any idea why im getting banding on the dresser on the left and a strange circle artifact on the back wall? It isnt there when in using primary GI samples 16 and secondary Gi samples 8 but gets worse as i raise them to 32x16 and 128x64 respectively ---
**Author:** ![anonymous\_user\_abbe071b](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_abbe071b](https://forums.unrealengine.com/u/anonymous_user_abbe071b)\ **Post date:** [March 22, 2019, 12:39pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1028 "2019-03-22T12:39:20Z")
> [@](#): > > Any idea why im getting banding on the dresser on the left and a strange circle artifact on the back wall? It isnt there when in using primary GI samples 16 and secondary Gi samples 8 but gets worse as i raise them to 32x16 and 128x64 respectively Are you using compression for lightmaps? (world setting - lightmap card, checker box of compression) Normally much better results are without compression. ---
**Author:** ![DsyD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DsyD](https://forums.unrealengine.com/u/DsyD)\ **Post date:** [March 22, 2019, 2:09pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1029 "2019-03-22T14:09:21Z")
> [@](#): > > I have no idea about the problem ☹ my code does exactly i said, treating all stationary skylights as static Well, thatt’s odd, then…I guess it must be something to do with the skysphere mesh then, behaving differently under static vs. stationary? It is set to Movable, so I would kind of expect the opposite behavior if there were something wrong with the mesh or material settings… ---
**Author:** ![dustintinkler](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/dustintinkler/32/484961_2.png) [@dustintinkler](https://forums.unrealengine.com/u/dustintinkler)\ **Post date:** [March 22, 2019, 4:36pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1030 "2019-03-22T16:36:51Z")
> [@tomtnt](#): > > Are you using compression for lightmaps? (world setting - lightmap card, checker box of compression) Normally much better results are without compression. Yep! you were right. I had separated this room form my original scene and forgot to check off compress lightmaps. thanks for the reply. ---
**Author:** ![dustintinkler](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/dustintinkler/32/484961_2.png) [@dustintinkler](https://forums.unrealengine.com/u/dustintinkler)\ **Post date:** [March 22, 2019, 4:38pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1031 "2019-03-22T16:38:26Z")
> [@DsyD](#): > > Well, thatt’s odd, then…I guess it must be something to do with the skysphere mesh then, behaving differently under static vs. stationary? It is set to Movable, so I would kind of expect the opposite behavior if there were something wrong with the mesh or material settings… check to make sure your material is set to unlit so its not affecting lighitng, also make sure your material is not two sided and that the normals are facing inwards. there is an inverse sphere mesh in the engine content that i usually use for my skies. ---
**Author:** ![kurylo3d](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/kurylo3d/32/1150889_2.png) [@kurylo3d](https://forums.unrealengine.com/u/kurylo3d)\ **Post date:** [March 22, 2019, 5:01pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1032 "2019-03-22T17:01:03Z")
> [@](#): > > While the newest testing Prometheus is missing a lot of features, it should work with LOD/HLOD though What is prometheus? Oh and how come the front page still says - Ray hit rejection by LOD/HLOD hasn’t been implemented and you may see black splotches where lower LOD meshes poke out. ---
**Author:** ![DsyD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DsyD](https://forums.unrealengine.com/u/DsyD)\ **Post date:** [March 22, 2019, 7:05pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1033 "2019-03-22T19:05:07Z")
> [@](#): > > check to make sure your material is set to unlit so its not affecting lighitng, also make sure your material is not two sided and that the normals are facing inwards. there is an inverse sphere mesh in the engine content that i usually use for my skies. Pretty sure I did all that but will check again, thanks! ---
**Author:** ![Thom\_Coffee](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Thom\_Coffee](https://forums.unrealengine.com/u/Thom_Coffee)\ **Post date:** [March 23, 2019, 9:46am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1034 "2019-03-23T09:46:07Z")
Hi Luoshang. Prometheus didn’t work on my spec: win10, GTX1080 and nvidia creator ready driver 419.67 or did i miss something? ---
**Author:** ![anonymous\_user\_951ded2c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_951ded2c](https://forums.unrealengine.com/u/anonymous_user_951ded2c)\ **Post date:** [March 23, 2019, 5:18pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1035 "2019-03-23T17:18:10Z")
good people i saw GPULightmass once working in my PC with gtx 970. with extreme quality and high settings it took less than an hour.and that was it, now it takes a day to built light of the same scene. I’ve Formatted my PC and re-installed everything. it took 4 hours to build the scene and back to insane hours again. please help ---
**Author:** ![armoredrat](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@armoredrat](https://forums.unrealengine.com/u/armoredrat)\ **Post date:** [March 24, 2019, 11:26pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1036 "2019-03-24T23:26:47Z")
> [@Philliano](#): > > good people i saw GPULightmass once working in my PC with gtx 970. with extreme quality and high settings it took less than an hour.and that was it, now it takes a day to built light of the same scene. I’ve Formatted my PC and re-installed everything. it took 4 hours to build the scene and back to insane hours again. please help it might be a driver issue. try another versions or if you havent install creators driver yet also try it. ---
**Author:** ![fco3d](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@fco3d](https://forums.unrealengine.com/u/fco3d)\ **Post date:** [March 25, 2019, 4:06pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1037 "2019-03-25T16:06:22Z")
First, this script is incredible!!! now I have noticed that images are darker than compared to regular lightmass. I can fix that increasing the GI in post but, is that the way to work with this?? Second, I noticed that glossiness display different, like way more glossy than regular shading. Someone else also seeing this? ---
**Author:** ![anonymous\_user\_951ded2c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_951ded2c](https://forums.unrealengine.com/u/anonymous_user_951ded2c)\ **Post date:** [March 25, 2019, 6:53pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1038 "2019-03-25T18:53:25Z")
> [@armoredrat](#): > > it might be a driver issue. try another versions or if you havent install creators driver yet also try it. thanks for the prompt reply. im new please can you explain to me by saying another driver where to find it and install it. same apply to creators driver. please take me step by step. ---
**Author:** ![OlegFrumson](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/olegfrumson/32/562929_2.png) [@OlegFrumson](https://forums.unrealengine.com/u/OlegFrumson)\ **Post date:** [March 25, 2019, 7:03pm UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1039 "2019-03-25T19:03:35Z")
Hello ! Thank you for such a wonderful rendering tool. [https://artstn.co/p/lV6nOY](https://artstn.co/p/lV6nOY) ---
**Author:** ![tc22\_LEOCHOU](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/tc22_leochou/32/491291_2.png) [@tc22\_LEOCHOU](https://forums.unrealengine.com/u/tc22_LEOCHOU)\ **Post date:** [March 26, 2019, 2:31am UTC](https://forums.unrealengine.com/t/luoshuangs-gpulightmass/109474/1040 "2019-03-26T02:31:19Z")
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