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Auto-set up dynamic lighting?

Is there any way to automatically set up dynamic lighting using an exterior image? Say if I had a dungeon map like this thing on the right. I know there's a script by Stephen that does something similar, but what about maps like this one?
1505411839
Jakob
Sheet Author
API Scripter
Maybe take a look at  Walls ?
1505412025

Edited 1505412039
Thanks, that appears to be more or less just what I needed! Now, to parse those instructions...
1505430102
Gold
Forum Champion
I use The Aaron's "Walls" script to do that. It isn't too hard really. The instructions may seem long but it's just a couple big steps when you actually do it. I believe it does help to have a map with a solid color background, more of a solid black would work better than that background that looks like TV static on the sample map you posted.
1505432192
The Aaron
Pro
API Scripter
When I do maps like this I select the floors with a fairly fuzzy magic wand, then invert and shrink back into the wall a few pixels. 
Good trick