To the casual viewer, you look at the picture: blip! You're done. For me the artist, most every entry represents hours of painstaking labour, not knowing for sure how the thing will turn out, and hoping that somewhere in the workflow there does not lurk a crippling mistake or error.
After laying in most of the colour on this piece, I discovered such an error, just a little digital tweak that I missed that changes the entire picture. That's why Rand has glowing skin tone and Kirk does not. I have to decide whether or not I can correct the mistake by hand, undo a day and a half of work by blocking the colours again from scratch, or try to make a digital fix in Photoshop.