What is G1, G2, G3?

 From:  Michael Gibson
2092.2 In reply to 2092.1 
Hi Ed, it refers to different "levels" of smoothness between 2 touching pieces.

It's somewhat difficult to describe without getting technical, but try these:
http://moi3d.com/forum/index.php?webtag=MOI&msg=290.1
http://moi3d.com/forum/index.php?webtag=MOI&msg=1307.1

- Michael