Golum, thank U very much!!!
"Can slow it down to a crawl if you have lots of long straight shaded areas, even worse if your adding terrain into the mix"
Sadly, i went for an outdoor battlefield to test!! All polys are exposed and rendered, even behind uncapped surrounding tall walls...
.
Maybe someone experienced could use the numeric FLAGS (in the properties/surface tag) to attach a script or something else that behaves like a HINT BRUSH. (wander if that could be possible?)
Anyway, thanx again.