It's my case too. Found nice polygons definitions, showing a lot more areas.

As I use a topo overlayed, most of them are not in draworder anymore and won't waste CPU time.
But some are transparent, so I have more infos (industrial zone, shopping zone, hospital zone).

After a long time behind TYPViewer it's done and done.
Added my final config in [Only registered and activated users can see links. ], maybe it's useful for someone...