I am using Unitys Third Person Starterkit and replaced The Stanard Charakter with my own i made in Blender. But since then he started floating around. It seems like the Model just don’t care about Physics even though the Player Armature cares about Physics. I have no clue how to fix it, does one of you know?
This is a really common issue. When you export a model if it mostly designed in a way that the root/origin is on the ground.
But as you can see in unity the object position of your character controller is not on the ground but in the middle of your capsule. So you have to offset your model by said distance. This can for example be done by moving your complete rig onto a child transform that you then can easily move to a desired position in the local coordinate system of your character controller.
let me know if that helped or if anything was unclear.