#15 Map display slows down on underground map

[Anonymous]

THUD took a massive nose dive when trying to display
an underground map.

Update/re-draw of the map was so amazingly slow i was
either past a hex or just about the leave a hex when
the nearby hex would finally display.

Several people using THUD had the same problem. I had
erase unknown terrain "off". Not sure if that's
related.

Sorry I was able to do much testing to try out
different settings.

It was suggested on pub that maybe because so much of
the map was out of los maybe that had something to do
with it.