a little test I made with my first attempt at making a fully Vegetated and decked out scene, the render required 9 hours cause I had to set Atmosphere samples to 64 Raytrace because the sunbeams from the clouds would be so darn noisy otherwise.
I hope to find a better mix of settings before render next time.
I tell you guys, water in this situation is a nightmare to get right. I still hate the way it looks, but its the best result I could get :/