Amazing. I like the overall lighting.

scary ) 

 good overall look :)

realy nice palette

not sure abot this tree

Good work with nice color choice. Sad point is the eyes are attracted by the sky, which has no texture and is not the central part of the pic. Maybe you dan dim it a bit and add a halo around the lava leaking tree?

 Not very fond of the background, but the tree itself looks really nice! Good job!

Awesome work!  The only thing thing I might add is some subtle orange light reflected off the nearby trees to help establish the space better . Great color choices.

Your best piece so far, the tree and lava looks good.  But I have some points to critique:

• Used to much AA at the top branches.
• The background doesn't looks finished, especially the right fir tree. To flat overall, give some depth to itI suggest.
• You could maybe add some grass and glowing.

 Very nice, I like it :]