[Radiance-general] Antimatter and windows

[Lars O. Grobe]

Hi Zack,

the problem you experience appears any time when you have coplanar
surfaces with different modifiers. A ray hitting such a surface sees
either material, and as they are coplanar this results in a random noise
/ mixture of both.

To use antimatter, place a box in you wall, so that the front side of it
is in front of the wall (you would see it from your position) while the
back one is behind. Make sure that there is no other geometry in the
volume of this box.

Now what happens is that a ray hitting the antimatter material with the
surface facing it will become blind, go on traveling the same direction
(or modify it according to what you give in the second line of the
antimatter modifier's definition), and start seeing geomertry only once
he passed thru the back of an antimatter surface again. In other words,
it is like if the ray jumps between the antimatter surfaces ignoring
everything in between.

Hope this is correct, but that was the result of looking at that part of
the code once ;-)

Cheers, Lars.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3740 bytes
Desc: S/MIME Cryptographic Signature
Url : http://radiance-online.org/pipermail/radiance-general/attachments/20090910/7e6b843d/smime.bin