Re: Map Info from Carmack

Chris Carollo (
Sun, 21 Apr 1996 10:49:00 -0400

Date: Sun, 21 Apr 1996 10:49:00 -0400
From: Chris Carollo <>
Subject: Re: Map Info from Carmack

> > *** E-Mail from John Carmack - 4/21/96
> > The seperate clipping hulls (there was one in qtest, but there are more
> > now) are automatically generated in the bsp utilities by doing a beveled
> > hull expansion on the brushes. You don't need to do anything in the map
> > editor.

What does he mean by "clipping hulls"? And there was only *one* of
them in qtest? It doesn't sound like he just mean hulls separate from
the main level hull...

> > You can add brushes that only show up in the clipping hulls (invisible
> > blocking brushes) by giving them the texture name "clip".

So we can define invisible volumes? Or does he mean that we can define
a brush that does a boolean subtract?

> If anyone knows what "beveled hull expansion" is then please feel free to
> share.

Seconded. :)