Damn! When I saw the first image I thought it was just a shelf.
He should seriously consider submitting that to ArtPrize in Grand Rapids, MI. It's an annual event that people from all over the world participate in. Grand prize is 200k. Your dad would have a good chance at it.
Not very many paintings can truly be called a "masterpiece", but this definitely is one of those paintings... It's absolutely remarkable.
OP, is there anywhere where we can check out more of your dad's work?
Man, this is incredible. Congratulations to your father for the completion of such an amazing work.
(a) Someone pays a ridiculous amount of money for it and then very quickly puts it into a museum so everyone can appreciate it. OR
(b) your father donates it to a museum.
Either one is amazing, and BTW, this is beyond words.
This needs to be made into a jigsaw puzzle. Not the original obviously, but I really want this as a puzzle.
I wish that I could paint this well but I've never had heart or kidney failure.
This is brilliant work! Now, take a high quality digital scan of this and make a 1000-2500 piece jigsaw puzzle out of it. This is exactly what I look for in a puzzle.
PS, tell dad he's very gifted and his masterpiece is appreciated.
This is better than having a shelf full of toys because you won't have to keep dusting everything.