Is light building CPU only?

[darthviper107]

@FrankieV;582887

GPU rendering is possible but usability is split into two camps of CUDA and OpenCL so has the same problem in Unreal 4 as hardware physics where nVida supports CUDA and ATI supports OpenCL.

Example of CUDA based rendering.

https://www.youtube.com/watch?v=Htv26S-7YqU

As mentioned video memory would become a problem for any kind of real time rendering but environment lightmass rendering could be just as fast, if not faster, then network based rendering as well as a huge bump in per frame rendering of 4k images.

At the very least would make for a very useful 3rd person product as a rending solution for Unreal 4 like a V-ray or Renderman plug in solution for say 3ds Max.

In UE4 it doesn’t take advantage of GPU for PhysX, Epic didn’t want an unbalanced feature.

For building lighting the GPU would still have the issue of memory