While incarcerated for murder, cartoonist Jack Deebs found escape by creating Cool World, a series featuring a voluptuous femme fatale named Holli Would. But the artist becomes a prisoner of his own fantasies when Holli transports Jack into Cool World with a scheme to seduce him and bring herself to life. Hard-boiled detective Frank Harris – the only other human in Cool World – cautions Jack with the law: Noids (humans) don't have sex with doodles (cartoons). However, flesh proves weaker than ink as Holli takes human form in Las Vegas, staring in a trans-universal chase that threatens the destruction of both worlds.
betcha the only thing you're member about this was from the trailers;
"Holli would... Holli would if she could"
Bakshi apparently pitched a darker film that the studio rewrote and reworked, but honestly i don't think anything would have helped the film be anything more than "Roger Rabbit but Horny".
This movie made up it's own universe rules as it went, and then didn't bother sharing that info with the audience. The whole thing comes off as an unfinished work print version of the film that they just released cause they couldn't bother finishing it.