René Aigner's Sketchbook

[Kaffer]

those rock studies are soo juicy! Do you start with an underpainting in these or add the color vibrancy along the way?
I dunno if you are planning to go on with your personal piece, if you accept a humble critique, I might try putting some extreme foreground elements in there, both for compositional reasons and for helping to give it depth.. it has such awesome textures in it, but I feel it flattens it a bit too.. sorry if my crit is out of place, I don't mean to be rude :)
Your lighting study also kicks ass, that wood tile texture is just gorgeous..