I'm having multiple problems with this game, there is a way to play it without so much graphic problems? (sometimes it just screw up, making the game unplayable)
Fully playable with jabo's plugin I know, enabling force normal blending helps a little. Most replays are messed up, though, as some other scenes. Apart from that, fully playable.
Last I tested this was on pj64, but it should work just as fine on 1964.