Map Entities are not static blocks (maybe you meant prefabs?), they are in fact dynamic blocks, if you want to call it that way. Map Entities don't serve any real purpose, they used to be available in A4 (?) because they provided polygonal detection and models didn't.
Mo222, what kind of shadow are we speaking of, stencil shadows?
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual
