Limitations for collision detection for cameras to only First Person mode?

Hi,

From what I have read on the forums, it looks like it is only possible to prevent the camera from going through objects in a scene , only if the camera is set to ‘First Person’ mode with a collision material assigned.

Is this correct please?

I was hoping to use an orbit camera mode to look at a simple city scene. Pan around and zoom in style.

What about using collision meshes in the blender file instead, would this work at all?

Many thanks,

Jas