i smashed some geometry features into the floor panel. it works way better now
however, now it could even use some more geometry over the lights.
here's the pic..
and yes this panel would need some 3d features in it to be a cool panel.sorry for this fail.
all in all not a very satisfying result
here it is in the same environment like the last panel.
also there's lack of dirt in the diffuse. especially in corners and cavities.
so when your 3d features in a floor panel are very prominent, then better use a unique 3d mesh for it instead of only a plane.