Hi all
A while back I tried importing models into 3d coat and it smoothed them all, which want very helpful as they were intended to have angles. But that's beside the point really.

The main reason for my post is that I'm a bit confused by the polygon issue. As far as I understand things less polygons is better because it uses less memory. Is there any advantage in (for want of a better example) displacement painting a wall? I've only just worked out how to UV map things properly so displacement mapping seems a bit of an advanced area at the moment and I'm wondering how and why I should use it.
Keith