Apologies if this has been observed elsewhere, but has anyone else
noticed that the matte object alpha channel options have changed in
7.5b. Gone is the singular button marked "Unseen by Alpha Channel"
replaced by a pop-up with 3 options "Use Surface Settings",
"Unnaffected by Object" and "Constant Black".
I will have a play with this later to determine what these two last do
that makes them different, but I'm a little annoyed that this change
is a) undocumented and b) not reflected in the spreadsheet.
Benjamin Smith | SFdp | www.sfdp.co.uk