Originally Posted by Demented
GIF may not be the best format for this comic since it has so many colors. GIF only supports 256 colors at the most in an image, and, while it can pick any 256 colors rather than from a definite pallette, 256 colors is not even close to sufficient for an image that makes widespread use of gradients.
Didn't know that.
Though, now that I think about it, it does make sense. I went and looked at this OoTS comic
and the light around the airship has some loss of color data.
After doing a bit of poking around, maybe *.PNG? It has truecolor 48-bit, though it has slightly larger file. This might be a better choice.