In article <3cf642a7@news.povray.org> , Micha Riser <mri### [at] gmxnet>  wrote:

> is not the same as in the second version the internal walls are removed.

Well, that is intentional as you are essentially misusing the "union" object
as a merge object in the first place.  There is no correct inversion of a
union object that is not a merge so POV-Ray changes it for you automatically.
So inverting has a side effect in this case, yes (and maybe a warning might be
a good idea for this), but is changes nothing about the optimal handling of
"inverse", that is multiple-inversions will not add any otherhead, which is
the answer to the initial question you asked...

    Thorsten

____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message