Hmmm, IMHO..... ~I would try to link the mountains together by texture, they are radically different, and a bit small in scale for the size of the ship/plane(?)unless that was your intention ~If the ship/plane is the focus of the image, possibly zoom in on it more, or use a different angle for the crash ~the tree does stick out like a sore thumb, either ditch it altogether or have lots more with a muted tone similiar to the mountains ~Also try to tie the ground into the mountain texture, so they don't look like they are sitting on top of it.... ~there is good diagonal flow but you need a hot spot, like the ship crashing into the mtns with a big explosion, instead of it not quite hitting it yet.... ~and as you noted the smoke needs just a little tweak...

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