The changes are best demonstrated by screenshots, of course. First the original, followed by the new look:




Other tiles have been changed only in certain cases when they border on a woods tile and the brightness spills over.
Although I like the CW2 map, I've never understood why the woods are so bright between the trees. I've found it distracting, so I thought I'd change it.
Back up the Civil War II/CW2/Graphics/Regions file first just in case.
Here's the download link:
http://www.mediafire.com/file/gk49va75xleymwi/CW2.zip
Extract it into the main Civil War II folder and overwrite when asked.