I would like made large 3d environtmen with the mountain and woods ,castle and the crowded little house, the real problem that i fice in this project that my pc cannot handle the size of rendering process and the particle system that i used to made grease eat lot of Ram and the volumetric shadows is made my pc melting. but it work fine if i just render it as png picture but still took 5 min to render even that i use layer rendering. i hope i could find solution for render volumetric shadows that i think i could do it on the compositing section but, i just don't understand much with the node editor. hope that someone help me with this