I am trying to apply flats for a comic. For some reason, Photoshop is coloring outside of my selections. You can see this most clearly in the hand of the robot, where there is a feathered grey outside of the selection. I assume I just have a setting wrong or something. Any help you can offer would be greatly appreciated.
There are several setting you should look at Selection feathering, Brush hardness. I also think Adobe Photoshop Brush strokes are anti-aliased painting with a pencil may produce sharper edges. Also have your comic book black outline on a transparent layer above the layers you color. That way the outline will not compromised with color.