[DTV]

I'm try to figure out if there's a way to change a texture of an object that already exists in the vanilla map, is there any way to do this?

[TommyB]

Nope. You'd have to remove the object, create another one in the exact same spot and then use SetObjectMaterial on it.

[Pottus]

https://github.com/Pottus/Texture-Studio

Specifically, /gtaobjects - /gtashow - /gtahide - /remobject - /swapbuilding

/sindex - Set text on a object will show material IDs
/rindex - Removes material indexes shown on an object