“This was a very-1970s guerrilla production. Before it was over, Goldman had stolen rain and snow overlays from Disney’s garbage. A young Glen Keane created the sound effects for a truck’s exhaust pipe. Bluth, Goldman and Pomeroy animated most of the film, but Bluth’s main memory of Banjo was mixing cel paint by his swimming pool.
Gradually, the production (and the rows of work desks) outgrew Bluth’s garage and took over his whole Culver City home. Guedel recalled that Bluth “literally lived with only his own single bed and a dresser in his small bedroom” — every other space “was filled with animation equipment.” During the busiest periods, Banjo artists slept where they worked and sleeping bags dotted Bluth’s house”
https://animationobsessive.substack.com/p/don-bluths-garage-band