Custom Map Thumbnail Images

[knucracker]

When your map becomes available online, there will be a little thumbnail graphic of the map.  If you are curious what this thumbnail will look like before you upload your map, you can take a look.  It actually gets written to disk at this location:
%userprofile%\Documents\creeperworld2_screens\thumb.jpg. 

This file will get written out each time you save your map.  So take a look at this image to see what your thumbnail will look like before you upload your map.