Indigo Renderer Forum

I tried enabling GPU acceleration in Skindigo but it seems substantially slower than regular CPU rendering. Why is that? I have dual nVIdia 670's so I thought that GPU would accelerate rendering not slow it down.

Because the current GPU acc system is not very efficient and is being replaced in 4.0.

The current GPU acc works best in exterior scenes and scenes with big emitters. Not great for interiors, where BiDir is generally preferred.