A rather simple tutorial I've made.
I've saved you the hard work of finding the vertex data within the coins' display lists, so just navigate to 0xAB7AD8 in a hex editor that has opened a SM64 ROM. There's a vertical line of RGB's. The first set of 4 are the yellow coin, the second set of 4 are the blue coin, and the third set of 4 are the red coin. The reason that there are 4 RGB's for each coin is because there are 4 vertices within the billboarded square.
Here's the layout of RGB's:

The original coins:

Golden Coins (FF C1 25 RGB):

I've saved you the hard work of finding the vertex data within the coins' display lists, so just navigate to 0xAB7AD8 in a hex editor that has opened a SM64 ROM. There's a vertical line of RGB's. The first set of 4 are the yellow coin, the second set of 4 are the blue coin, and the third set of 4 are the red coin. The reason that there are 4 RGB's for each coin is because there are 4 vertices within the billboarded square.
Here's the layout of RGB's:

The original coins:

Golden Coins (FF C1 25 RGB):
