I would have done so except that the camera needs to zoom close to the character as well which causes the same problem (character gets clipped). And I kind of want the camera to be able to get at least that close to the wall (as in the screenshot). I have tried moving the far clipping pane closer but that doesn't help.
If i went and scaled everything in the world 10 times larger it should solve the problem. but at this point that will be alot of work and only a last option. (atm 1 unit = 1 meter on client and on server).