Here's an example I just did in photoshop... there's no secret 1 - added green (0,128,0) 2 - subtract green (0,128,0) 3 - added red (128,0,0) 5 - subtract red (128,0,0) background is 128,128,255 Here's the photoshop file if anybody wants to understand: https://dl.dropboxusercontent.com/u/10617759/nmap_layers.psd Reminder,…