This render uses no lights and no sun, only the hdri image, it rendered in 2 minutes and 45 seconds... really really fast. No shadows though, and I had to fiddle with ambience/reflectivity of the terrain in order to compensate for the lack of direct light... Not quite as nice, but a 3 minute render time... My question, is the light dome worth the effect it produces vs the render time? Also take into account that the second pic I fixed up some mistakes. And for some reason the jpegs look like crap... had to get it below 200 k