Surreal paintings:
http://i1371.photobucket.com/albums/ag300/Liz_Amsden/Classic%20Paintings/01-15-16_5-05-54nbspPM_zpsgivxbio3.png
According to this list, there should be one more medium and one more large size paintings. I painted hundreds (no exaggeration), without finding them. If anyone knows what they are, I'd love to see them!
Small:
Low skill- 3
Medium - 4
High - 4
Medium:
Low skill - 7
Medium - 5
High - 4
Large:
Low skill - 5
Medium - 2
High - 5
Low skill available at level 5, Medium skill available at level 7, High skill available at level 9.