This is my commentary on how I color my battle maps using Gimp, a free alternative to Photoshop. I focus mostly on the ever-important skill of layer management, and ramble a little about color theory too.
In summary:
- Isolate your line art
- Put your colors down on separate layers
- Put your light and shadow down on their own, top-most color layers
- Play around with your colors until satisfied.
This video features the Dwarven Outpost map.