While many saw Roy Disney as being the money guy at the Disney Studios, he saw himself as someone who could be a little creative as well.
With the success of DISNEYLAND, there was more money around the company to work with. Roy decided to use his own share of the profits to invest in a slate of science fiction films. His brother Walt felt that the films were of dubious quality, but Roy still made the investment. The films didn't exactly fail, but they weren't successful either. Roy ended up sticking to the financial side of things.