 | | | reflections | reflections 2004-04-14 - By Sylvain Moreau
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Hmmm, I really don't see why this should be done in 16 bits...
In the FX tree use the MathComposite node and 'Screen' the reflection pass. you
can use the 'Mix Level' to control the amount of reflection. 'Screen' does the
same as 'Add' but in a smarter way (with 'Screen' values cannot go higher than
1, no need to clip).
Never use the alpha channel of a picture to comp light effects (reflections,
glow, flares, etc.)
When you need to add light to a picture always use Screen.
When you want to remove light from a picture always use Multiply.
syl
-- -- Original Message -- --
From: Dan Yargici
To: XSI@(protected)
Sent: Wednesday, April 14, 2004 3:16 AM
Subject: Re: reflections
Render your reflection pass as 16bit. Then Add. It sounds as though they're
being clipped.
DAN
-- -- Original Message -- --
From: duncan_burch@(protected)
To: XSI@(protected)
Sent: Tuesday, April 13, 2004 6:56 PM
Subject: reflections
Hi all
worringly stupid question, but my tired brain cant figure it out today.
How comes when I render a reflection pass and combine it with my beauty
render, does the reflection pass not seem as "strong" as how it would
originally.
I swaer ive never had this prob before.
Does that make sense?
Dunk
Duncan Burch
XSI 3D Lighting and Rendering Artist & TD
www.duncanburch.com
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<DIV><FONT face=Arial size=2>Hmmm, I really don't see why this should be done
in
16 bits...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In the FX tree use the MathComposite node and
'Screen' the reflection pass. you can use the 'Mix Level' to control the amount
of reflection. 'Screen' does the same as 'Add' but in a smarter way (with
'Screen' values cannot go higher than 1, no need to clip). </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Never use the alpha channel of a picture to
comp light effects (reflections, glow, flares, etc.)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>When you need to add light to a picture always use
Screen.</FONT></DIV>
<DIV><FONT face=Arial size=2>When you want to remove light from a picture
always
use Multiply.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>syl</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=dan@(protected) href="mailto:dan@(protected)">Dan Yargici</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> Wednesday, April 14, 2004 3:16
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: reflections</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Render your reflection pass as 16bit. Then
Add. It sounds as though they're being clipped.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>DAN</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=duncan_burch@(protected)
href="mailto:duncan_burch@(protected)">duncan_burch@(protected)</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, April 13, 2004 6:56
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> reflections</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hi all</FONT></DIV>
<DIV><FONT face=Arial size=2>worringly stupid question, but my tired brain
cant figure it out today.</FONT></DIV>
<DIV><FONT face=Arial size=2>How comes when I render a reflection pass and
combine it with my beauty render, does the reflection pass not seem as
"strong" as how it would originally.</FONT></DIV>
<DIV><FONT face=Arial size=2>I swaer ive never had this prob
before.</FONT></DIV>
<DIV><FONT face=Arial size=2>Does that make sense?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Dunk</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Duncan Burch<BR>XSI 3D Lighting and Rendering
Artist & TD<BR><A
href="http://www.duncanburch.com">www.duncanburch.com</A></FONT></DIV><
/BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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