Ground and folder pavements were boxes a few centimetres apart (and
nested folders beyond depth four shared one height), well below depth
buffer precision from the helicopter, so their tops z-fought. The floor
is now a separate layer painted first in nesting order with depth
testing off, drawing only top faces, so deeper folders cover their
parents cleanly at any distance; buildings and everything else are
drawn afterwards with normal depth testing.
Andy Dixon
8690cb91a0
