This scene was modeled in Blender 2.67, rendered with cycles @ 2000 samples and some post work with GIMP. For the wall and floor i use a displace texture. The plants are also modeled (not planes with alpha textures). I think i have some issues with my water material (i simply use glass shader) and with the rocks.
C&C are welcome!
Render time was about 1 h.
PC Specs: i7-3820 @3.6 Ghz. 8 GB RAM, GPU: Quadro 2000