I started this off as a little experiment and practice with materials and it came along fairly nicely, for me anyway. So I wanted to show it off. here it is…
The Overall coloring seems good. But the detail is lacking
Looks good, nice use of particles:) However, as TV Crash said, it’s not all that detailed. Maybe add more to the bridge, for example more supports at either end (it would probably fall down as it is) and possible rails on the sides. Also, you should put more random boulders and dead trees and things into the background.
I think the eruption in the background should be slightly closer to the centre, it seems to be the focus of the picture but it’s tucked away in the corner at the moment which draws the eye away from the rest of the image (as your eye is normally drawn towards the brightest part of a picture).