Koko's     Paint By Number Kit
Choosing a good photo for a Paint By Number
Poor Choices                                                    Good Choices
^ There's just too much detail here.

The face of the person would either be a
paintable but unrecognizable blob or it
would be made up of dozens of tiny little
pieces that you would need to paint with
a magnifying glass.
^ This photo contains the two important
faces and not a lot of extra detail.
^ The photo can be cropped to an ideal
Paint By Number format.

< Too much detail for a PBN - This can
be done as a Grisaille painting