Early on we talked about if photo shop was ok. Now Scenic Screenshots is very heavy with MGE, plus there are tons of questions about it and it's shaders.
So now it has it's own thread for MGE.
http://www.gamesas.com/bgsforums/index.php?showtopic=1038915
http://sourceforge.net/projects/morrgraphext/
What are shaders? (link forthcoming)
http://mgeshaderlibrary.wikispaces.com/Shaders
http://mgeshaderlibrary.wikispaces.com/Using+Shaders
Now, continue with the epic graphics.