How to fix a 3D model to the ground?

[Abad26Pani]

Hello! I'm doing a university project on augmented reality.
I want my 3D model to remain fixed on the ground and the user can´t move or scale it.
i don´t know how to to that. :(

[elalish]

You can use ar-scale="fixed" to fix the scale. We don't allow fixing the position, as it's too likely to be wrong - estimates of where the floor is improve over time, and it's difficult for a user to place the object in the correct position without the ability to reposition it.