Thanks lazzhar. It took about 5h, but mainly because of the expensive indirect illumination, which was photonmapping + finalgathering. Without it, it’s a piece of cake, thanks to Jeremy Pronk’s IBL Tools. Basically the IBL Tool’s spherical light I’m using acts as a bunch of directional lights - pretty cheap to render. I could post one without the indirect light, but it destroys the mood imo.
A breakdown of the rendering process:
0:32:14.39 for computing finalgather points, using precomputed photon lookup of a 300k photonmap,
5:09:13.07 for rendering. The sss lightmap took probably as long as the finalgathering stage. Original resolution was 1k square, rendered on an AMD2600+/1GB RAM.