BeaverThingify | Ghost Door @BeaverThingify | Uploaded September 2021 | Updated October 2024, 4 hours ago.
It is known that when doing the door glitch in Sirena two that no floors exist in the rooms and Mario will fall right through the rooms to the previous room. It's also known that if you dive back into the door and open it, you will downwarp to the lower floor instantly and open an invisible door. What I believe I discovered is that the actual door animation is delayed until you load that floor, which leads to a rather funny situation where it appears that the door closes as soon as you approach it.
It is known that when doing the door glitch in Sirena two that no floors exist in the rooms and Mario will fall right through the rooms to the previous room. It's also known that if you dive back into the door and open it, you will downwarp to the lower floor instantly and open an invisible door. What I believe I discovered is that the actual door animation is delayed until you load that floor, which leads to a rather funny situation where it appears that the door closes as soon as you approach it.