And there is zoom.inc:
from slime (but I didn't find it on his page www.slimeland.com)
just googled for it, and just found it here:
http://news.povray.org/povray.binaries.scene-files/attachment/%3C3cdd900a@news.povray.org%3E/zoomin.inc.txt
(There's some help at the start of the file)
kalle
