The door appears on a rooftop of the Mendez Building in Downtown, on the mainland of Vice City. The door appears in different colors depending on the time of day and also has a strange, gritty texture to it. The main reason that the door looks very strange is because the texture is slightly transparent, making it appear rusty. This is caused because the textures only somewhat load, causing the rest to be invisible.
To fix this glitch, the player has to exploit a glitch that allows them to walk through walls. Then, the player will need to walk through a building where they will fall to the ground. This will force the game to reload all of its textures as soon as the player lands. Once the player goes back onto the roof, the door looks like a normal, white, non-transparent door.