Luoshuang's GPULightmass

[LegendreVR]

Anyone encountered this? Happens on one of my larger maps.

Time to get a GPU with more VRAM ! I also got this error on big archviz projects (multiple houses and buildings). Happens when swarm unloads everything in the memory of your GPU : if you dont have enough, the baker crashes with this error.

[The_Distiller]

I just installed and tried GPU Lightmass for the first time with 4.21.
Speed and quality are great, but my result is much darker than with the CPU baker. It is as if less GI bounces are computed. I tried increasing the indirect lighting contribution of the lights without any difference in the result. Bounces in the lightmass settings are set to 100.
Also I get a lot of errors in the lightmaps when setting any rectangle light to stationary. Only when setting it to static the bake works fine.

Try to increase the FireflyClampingThreshold in the BaseLightmass.ini in the engine\config folder from 10 to 50 or 100. Be aware that since you increase the threshold you might need to increase samples as well to get a clean result.

[DIO_666]

Try to increase the FireflyClampingThreshold in the BaseLightmass.ini in the engine\config folder from 10 to 50 or 100. Be aware that since you increase the threshold you might need to increase samples as well to get a clean result.

Thanks! I´ll check it out! I already increased the samples in the BaseLightmass.ini and the results were great. I got a better quality in 10 minutes on my 1080ti than in almost two hours on my CPU.
But I didn´t touch the fireflyClampingThreshold until now, because I didn´t know what it was for.

[A-J-K]

I just installed and tried GPU Lightmass for the first time with 4.21.
Speed and quality are great, but my result is much darker than with the CPU baker. It is as if less GI bounces are computed. I tried increasing the indirect lighting contribution of the lights without any difference in the result. Bounces in the lightmass settings are set to 100.
Also I get a lot of errors in the lightmaps when setting any rectangle light to stationary. Only when setting it to static the bake works fine.

Thats funny, for me GPU luightmass is like 10 x brighter than the simple CPU lightmass. I was using 300 lumen lights and i had to put them down to 30 lumen to match my old results.

[KTRN]

Anyone encountered this? Happens on one of my larger maps.

For me, it helped to change MappingSurfaceCacheDownsampleFactor to 4 or even 8 value in BaseLightmass.ini

[Situx]

I don't have access to GitHub from work, unfortunately, but I'll take a look at it tonight.

Done, updated for 4.21

[JoeWintergreen]

Luoshuang just thought I'd pop in to say thanks for all your work! GPULightmass is amazin' and I'm using it for everything I don't need HLOD clusters for. Saving me a huge amount of time.

[LegendreVR]

Luoshuang hey ! Awesome work on the 4.21 release, GPULM is a tool we cant work without

I just got this error after trying to bake lights on datasmith model, wonder why it happens on this one only ? (also the first time I see a primitiveCount >0 error)

Cheers !
Antoine

[exploited]

Luoshuang hey ! Awesome work on the 4.21 release, GPULM is a tool we cant work without

I just got this error after trying to bake lights on datasmith model, wonder why it happens on this one only ? (also the first time I see a primitiveCount >0 error)

Cheers !
Antoine

Same here. I get no error though, it just stops the baking. Works in empty scene.

[TeeHokken]

I made a script that will automatically download and install GPULightmass on your binary installation folder, perform a batch of checks to avoid issues (like nvidia driver version and TdrDelay), and allow to change GPU bake quality among fast, medium, high, extreme, without the need to restart Unreal.

If it helps someone, just give me a "Like" below.

UPDATE 12/11/2018: Now updated to work with 4.21 (Unified Settings). Allows to chage settings on the fly between different BaseLightmap.ini configurations.

Thank you so much...

[thundermax1979]

Millions thanks to Loushuang and Situx Your life time saver the scripts you made woks perfectly on my RTX gpu My job work flow become easier faster ,I can baked project very fast and I can switch the quality settings without restarting unreal ,..

Thanks Again.,

[Raildex_]

I receive an Unspecified Launch Error when GPULightmass on radiosity cache 3/xyz

[PMcKenzie2004]

Luoshuang, how does GPU Lightmass determine how much VRAM it needs? It loads all level geometry, materials, and then makes lightmap (image) files, right? It seems to vary build-to-build; my 1080 ti 11GB has been fine but I'm wondering when I'll hit the limit if I make my design larger, go to 4K textures, etc. Any way to check on specific things using VRAM during a command line build simliar to what Octane Render does? Thank you again.

[Nereon]

Hello, Luoshuang!
I was very inspired by the pictures of your plugin and decided to try it with Unreal Engine 4.20.3
But one error constantly disrupts the whole process.

I got latest drivers Nvidia on two Geforce 1080 cards
I changed Windows TDR to 300
Lightmass is fast preview

Can you help me with it?

[fangchampaign]

I just start to use this project. I installed it through Situx's script to UE4.21.1. Somehow I got no indirect lighting effect for static lights in my scene. It appears that light building was completed before GPU lightmass process finished.