 | | | bsp tweaking and volume effects | bsp tweaking and volume effects 2005-07-06 - By kim aldis
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but volumetric lights cast rays for the shadow calculations. Just try it,
see what happens.
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From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf Of
peterb
Sent: 06 July 2005 15:18
To: XSI@(protected)
Subject: Re: bsp tweaking and volume effects
this is a guess,
but i would expect it not to matter.
as far as I know, bsp is for storing geometry / triangles in memory, and
looking those triangles up when shooting rays.
if your geometry is as simple as you suggest, even "bad" bsp settings
shouldnt slow it down.
(but I might be completely wrong)
I would look to the marching step settings and AA settings to speed things
up.
also, is you big volume light an area light?
I know nothing about binary space partitioning so this is a stab in the dark
really..... but could tweaking the bsp settings have much effect on volume
effects? I've nothing in my scene bar a semi transparent plate and a big
volume light casting shadows - stained glass window style. I've got to set
the ray-marching steps quite low but it's taking a couple of hours plus per
frame which is unacceptable so...
Any ideas?
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<DIV dir=ltr align=left><SPAN class=156082314-06072005><FONT face=Arial
color=#0000ff size=2>but volumetric lights cast rays for the shadow
calculations. Just try it, see what happens.</FONT></SPAN></DIV><BR>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid;
MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)] <B>On Behalf Of </B>peterb<BR><B>Sent:</B>
06
July 2005 15:18<BR><B>To:</B> XSI@(protected)<BR><B>Subject:</B> Re: bsp
tweaking and volume effects<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2>this is a guess,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>but i would expect it not to matter.
</FONT></DIV>
<DIV><FONT face=Arial size=2>as far as I know, bsp is for storing geometry /
triangles in memory, and looking those triangles up when shooting
rays.</FONT></DIV>
<DIV><FONT face=Arial size=2>if your geometry is as simple as you suggest,
even "bad" bsp settings shouldnt slow it down.</FONT></DIV>
<DIV><FONT face=Arial size=2>(but I might be completely wrong)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I would look to the marching step settings and
AA
settings to speed things up.</FONT></DIV>
<DIV><FONT face=Arial size=2>also, is you big volume light an area
light?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
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<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I know nothing about binary
space partitioning so this is a stab in the dark really..... but could
tweaking the bsp settings have much effect on volume effects? I've nothing
in my scene bar a semi transparent plate and a big volume light casting
shadows - stained glass window style. I've got to set the ray-marching
steps
quite low but it's taking a couple of hours plus per frame which is
unacceptable so...<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Any
ideas?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P><
/DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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