@DaveC: I will try to put together a few screen shots an explanations on object placement and how I did it on this image. (It may be this weekend as my daughter is in labor with my

FIRST Granddaughter!

and things are hectic right now.

)
@calico: Yes it is a steam plume rising out of the crater.
@old_blaggard: I would be happy to upload the log model and the sled models. (After the above reason has slowed some

)
Also the cloud seems odd because it is stretched too much, I tried to do it in one cloud layer instead of two or three which is what I will try in the next set of renders. The single log in the foreground is one from Gary Pooles tutorial on a simple scene.
There will be more updates this weekend depending on how busy things are.