Luoshuang's GPULightmass

[Luoshuang]

@marcClintDion

I didn’t read the whole thread so please forgive me if I say something that goes against your stated intentions.

If your goal is simply to get UE4 up-to-date with a GPU scene baker then have you considered going with a CUDA/OpenCL based renderer that’s already feature complete and also free and open source.
Blender Cycles originally offered a choice between CPU and CUDA rendering for many years and then some engineers from AMD did a partial rebuild that allowed it to work with OpenCL as well.

It can take advantage of multiple GPU’s and recently gained the ability to split the rendering load between the GPU and CPU for scenes that require extraordinarily large amounts of RAM.

So far as I understand it, integrating Cycles into UE4 would be mostly just a matter of building the interface between UE4 and the Cycles stand-alone application. Once that’s completed, users would simply have to download the Cycles engine and drop it into the appropriate folder.

The official Cycles development team could always use help to improve the engine if that’s what you like doing, no pressure

Here are some link to show what people have done with Cycles and the last link has some information on how to get started with the Cycles stand-alone application.

https://www.cycles-renderer.org/

https://www.blenderguru.com/articles…tworks-of-2017

https://wiki.blender.org/wiki/Source…les/Standalone

Quick question: how is its speed compared to GPULightmass?
An example is Unity’s recent GPU Lightmapper - while also being GPU-based, it is much slower than GPULightmass
EDIT: Unity’s videos about their GPU Lightmapper make people hyped, but from my point of view they show a lot of heavy textured scenes and the scene is generally dark which makes it easy to hide GI quality problems. I tested both the Unity’s official one and Arthur “Mr. F” Rakhteenko’s Bakery- which is a third-party GPU Lightmapper for Unity - in the SunTemple scene, and Bakery performs much better. Also I had a nice talk with Arthur and I’ve decided to integrate Arthur’s ideas about lightmap-space sampling to eliminate lightmap space artifacts.