Python

Python is also pretty good for production, provided you're using libraries optimized in something faster. Is there a reason you didn't use Open3D's Python library? I'm guessing you'd get close to the same performance of the C++ code in a lot less time.

That said, if you're doing an animation in 3D, you should probably consider a game engine. Godot w/ GDScript would probably be good enough, though you'd spend a few days learning the engine (but the next project would be way faster).

If you're writing a performance-critical library, something compiled is often the better choice. If you're just plugging libraries together, something like Python is probably a better use of your time since the vast majority of CPU time can generally be done in a library.