[Sticky] Explanation: What is "BFC"?

[Roland Melkert]

To explain to new users and those who are curious, I wrote a Wiki article about BFC:
http://wiki.ldraw.org/index.php?title=BFC

As usual for a Wiki, anybody wanting to improve/extend that article, please go ahead!

You mention culling, but I think these days the most important reason for winding is lighting calculations.