 | | | secondary ray | secondary ray 2005-03-29 - By Haarm-Pieter Duiker
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Hello,
Transparency Rays aren't considered to be Secondary Rays. If you look in the
old "Progamming mental ray" book, Section 3.4 discusses the state and the ray
type variable state->type. Eye rays and Transparency rays are considered to be
primary. It appears, somewhat confusingly, that secondary rays are defined to
be rays generated at an intersection point. Guess the definition of primary is
overriding the definition of secondary in your case.
Regards,
Haarm-Pieter Duiker
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]On Behalf Of
Guillaume Laforge
Sent: Tuesday, March 29, 2005 6:00 AM
To: XSI@(protected)
Subject: Re: secondary ray
In fact secondary ray seem to work with transparency only if refraction is not
set to 1.
It seems mentalray switch to scanline for refraction = 1.
Cheers,
Guillaume Laforge
CG artist
www.vol2nuit.fr
-- -- Original Message -- --
From: Gerbrand Nel <mailto:gerbrand@(protected)>
To: XSI@(protected)
Sent: Tuesday, March 29, 2005 3:12 PM
Subject: secondary ray
couldn't find anything in the archive regarding this so here goes.... has
anyone else noticed that the secondary ray feature doesn't always work... I
placed an object with secondary rays switched of behind a 100 % transparent
grid but wen I render, the objet still renders... anyone??
g
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<DIV><SPAN class=170290917-29032005><FONT face="Courier New"
size=2>Hello,</FONT></SPAN></DIV>
<DIV><SPAN class=170290917-29032005></SPAN> </DIV>
<DIV><SPAN class=170290917-29032005><FONT face="Courier New" size=2
>Transparency
Rays aren't considered to be Secondary Rays. If you look in the old "Progamming
mental ray" book, Section 3.4 discusses the state and the ray type
variable
state->type. Eye rays and Transparency rays are considered to be primary. It
appears, somewhat confusingly, that secondary rays are defined to be rays
generated at an intersection point. Guess the definition of primary is
overriding the definition of secondary in your case.</FONT></SPAN></DIV>
<DIV><SPAN class=170290917-29032005><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=170290917-29032005><FONT face="Courier New"
size=2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=170290917-29032005><FONT face="Courier New" size=2>Haarm
-Pieter
Duiker</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-- --Original Message-- --<BR><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)]<B>On Behalf Of </B>Guillaume
Laforge<BR><B>Sent:</B> Tuesday, March 29, 2005 6:00 AM<BR><B>To:</B>
XSI@(protected)<BR><B>Subject:</B> Re: secondary ray<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>In fact secondary ray seem to work with
transparency only if refraction is not set to 1. </FONT></DIV>
<DIV><FONT face=Arial size=2>It seems mentalray switch to scanline for
refraction = 1.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Cheers,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Guillaume Laforge</FONT></DIV>
<DIV><FONT face=Arial size=2>CG artist</FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.vol2nuit.fr">www.vol2nuit.fr</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">-- -- Original Message -- -- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:<
/B>
<A title=gerbrand@(protected)
href="mailto:gerbrand@(protected)">Gerbrand Nel</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=XSI@(protected)
href="mailto:XSI@(protected)">XSI@(protected)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, March 29, 2005 3:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> secondary ray</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>couldn't find anything in the archive
regarding
this so here goes.... has anyone else noticed that the secondary ray
feature
doesn't always work... I placed an object with secondary rays switched of
behind a 100 % transparent grid but wen I render, the objet still renders..
.
anyone??</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>g</FONT></DIV>
<DIV> </DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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