Fire and Ice

Has anyone else seen this?

It's an '80s animated fantasy film made by Ralph Bakshi (of 1960s Spider-Man, Fritz the Cat, etc.) a in collaboration with Frank Frazetta, with a screenplay by Roy Thomas and backgrounds painted by James "Dinotopia" Gurney and Thomas Kinkaide (!).

The story pertains to the end of the last glacial period, which as it happens was being controlled by a sorceror named Necron. Only the primitive heroes living in the volcano Fire Keep can stop the glaciers from spreading further south! Good thing they have both horse and pterodactyl cavalry (?!).