@LeeC2202 This is what one of the contributors to SHV.NET replied to my pull request:
"Every function treats missing parameters as 0, so this change doesn't affect GET_GROUND_Z_FOR_3D_COORD at all, just a visual change."
Apparently the function works just fine without the boolean at the end.

@LeeC2202 I made a pull request to add it.

@LeeC2202 Are you talking about the missing boolean?

@POPPINsteve You can browse through the Script Hook V .NET source code to find functions and variables you can use. https://github.com/crosire/scripthookvdotnet/tree/dev_v3/source/scripting

What sort of things would you guys need scripted?

@thattallboy That would be more of a rockfall, not an avalanche.

Yes, if the valves were added as a door to the vehicle (so that it could be opened/closed via script/trainer), or if the valves were added as an object that could be attached to the vehicle.

Since he is apart of the YCA Modder group, you could try and contact him through YCA. http://yca-mods.weebly.com/contact-us.html

@nathanjamesddg151 Yes I thought of that, but I don't know how to do make models for GTA V, so I'd have to learn how. If somebody can make a few rectangular objects of varying sizes (for different vehicle sizes), please make them and send them to me (or @Oskar since he possibly wants to make the script)!

@Oskar #2 is how my script does it in IV. The reason I didn't make the script for V is because I couldn't find a good enough object to place underneath the vehicle.