Restoring transparency to N64 rips?

[TeridaxXD001]

I ripped a model of the "My Room" map from Pokémon Stadium 2 using the VRML feature. There was a UV mapping problem that I managed to fix, but there's another problem I have no experience with. There's a clock on the wall. In the game, it's  round. However, mine looks like this:


How do I make it round again?