Some of my images on Wikipedia:
How a planet with ammonia based life may look.
Very old, need to do an update. Vertical version is at the bottom. It was picture of the day for 11/17/2007
Image of ice age earth at glacial maximum, based on data from "Ice age terrestrial carbon changes revisited" by Thomas J. Crowley (Global Biogeochemical Cycles, Vol. 9, 1995, pp. 377-389
Newest terraformed Mars using my latest techniques.
Newest terraformed Venus using my latest techniques. Older versions can be seen on the image's page.
Newest terraformed Moon using my latest techniques. Older versions can be seen on the image's page.
Old and replace by the one above. It's a featured picture and was picture of the day for 9/28/2009
Old, I made a replacement for this but have yet to upload it.
Old, no replacement will be forthcoming.
Ancient Mars while it still had water. Uses my latest techniques, based on MOLA data, and martian geologic history.
Old, vertical version of the top image. It's a featured picture