Galatea in 2-D is a fantasy novel by Aaron Allston in which the hero discovers that his drawings can be brought to life. Unfortunately, he lets this slip to The Rival who sets out to eliminate him.
Tropes included
Achilles Heel: Literal, since you can paint Achilles
Squick: In universe, on discovering the actual legend of Achilles and Penthesilea , which fortunately, the painted characters do not follow. Achilles killed Penthesilea. And raped her corpse.