I recently try to make a stage, where the player can walk on a model. But as you can see in the screenshots it doesn’t really work. So my question is if it’s possible to walk on a model without walking in the air and how to do that.
There is something wrong with your collision setting. There isn’t any problem with walking on models. In the mesh editor check how the collision for the floor pieces is setup. You can create a collision mesh in whatever program you are using and use it unreal. For now you in the details panel set the collision from default to use complex as simple and it will use the faces of the mesh for testing. This is expensive on the memory if it is a complex mesh but good enough for you to run around on for now until you can get yourself situated.