The Biggest Glitch in Final Fantasy VII Explained

Cloudsurfing is the biggest glitch in Final Fantasy VII (on PSX), and it's used for the game's biggest skips, including Disc 1 Skip (Oceanfly / Rebirth Skip) and Kalm Skip.

Notes: https://pastebin.com/fnzWGGLF
FF7 Speedrun Discord: https://discord.ff7speedruns.com

Appendix: Unabridged video of chunk visualizations for each cloudsurf:    • FF7: Cloudsurf Chunks Visualized  

Thanks to ‪@TheLilGecko‬ for TASing this game. I used a few of their TASes in the production of this video.

Also, thanks to m4v for his help in reverse-engineering the game, the tools he has developed, and his overall contributions to the speedrunning and modding scene.

Made using manim https://www.manim.community/
World map renders made using Blender with custom tooling to import the World Map model

0:00 Intro
0:59 World Map
5:27 Entities
6:12 Chunk Data (Triangles and Vertices)
8:36 Collision Detection
12:29 Degenerate Triangles
15:40 Stored Triangles
20:11 Chocobos
21:56 Stale Triangle References
26:00 Stale Point Triangles
28:30 Old Kalm Skip
28:57 New Kalm Skip
29:45 Disc 1 Skip
34:22 The VLC
35:47 Mountain Skip
36:35 Diamond Surf