Heres a scene i made today, inspired by the amazing images in Riven. Im trying to think of things i should add to improve.

I agree that i need to play with the wood shader. I just noticed how it looks like plastic. Thanks again CCP

It looks great. There's an odd sense of scale here; how big are those boards? How big is the rock we're standing on? I'm not exactly sure what to do to give the viewer more clues about the scale -- maybe some dry grasses poking up out of the rock? Maybe slightly smaller nail-heads? (And I think those nails should be a bit rusty, and maybe the boards should be a bit more ragged?) I'm not sure. I really like the shader of the granite rock. Nice balance in the composition. Like CCP, I really like the picture; just hoping to give you some critique to help make it better. Reminds me of what little I've seen of the game Myst.