AddTorqueを使ってロール軸を水平にしたい

Torque works with the right vector for pitch (but it all depends on the setup, ofc). You could use forward and up vectors to achieve other rotations - do note there is a difference between adding world torque and local space torque. There are (inverse) transform nodes to help out here or we can unrotate a vector, too.

Also, adding torque on all 3 axis simultaneously would be very difficult for the player to control. Depending on what the end goal is, consider implementing it in a such a way that they can use 2 axis at a time only.

It gets even more difficult if you want an algorytm that can arrest angular momentum and / or produce enough counter-torque to achieve a specific rotation for a spinning body. Example of what I’m talking about:

And then you may need to look into a nested PID controller.

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