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Hello, I've been using POV for a few years now although I've never really
made anything truly spectacular. Anyway, I've been trying to simulate
subsurface scattering with POV's media. I've found it looks a lot better
with photon mapping turned off. The first image is a render with ior 1.4
for the object with no photons. The second has no refraction in the object
but the results are very similar... I should have more images once my POV
finishes rendering the title screen for a game I'm making. 0 PPS so far...
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Attachments:
Download 'sss ior 1_4.jpg' (169 KB)
Download 'sss ior 1_0.jpg' (165 KB)
Preview of image 'sss ior 1_4.jpg'
Preview of image 'sss ior 1_0.jpg'
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In article <1gb### [at] 40tude net>,
Greg Edwards <edw### [at] hotmailcom> wrote:
> Hello, I've been using POV for a few years now although I've never really
> made anything truly spectacular. Anyway, I've been trying to simulate
> subsurface scattering with POV's media. I've found it looks a lot better
> with photon mapping turned off.
Did you have media photons turned on?
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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On Fri, 17 Jan 2003 14:39:24 -0500, Christopher James Huff wrote:
> Did you have media photons turned on?
Nope. Using photons created odd lines in the scene and broke the effect. I
think that POV's photons just deposit themselves in media but don't
actually scatter volumetrically.
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One more thing. I'd give an example but I'm still currently rendering the
SAME image that I mentioned before. It's been hovering at about 1 PPS at
1024x768. It should take off once it makes it through the isosurface
"walls". I'll be sure to post the image whenever it's done! I suppose I
could have turned down some more quality settings and focal blur but it's
close enough to done that I shouldn't restart.
Rendering line 232 of 768 [last line 2 PPS]
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In article <1qg778hvie6b9.1f5fm3o7pau3t$.dlg@40tude.net>,
Greg Edwards <edw### [at] hotmailcom> wrote:
> Nope. Using photons created odd lines in the scene and broke the effect. I
> think that POV's photons just deposit themselves in media but don't
> actually scatter volumetrically.
You are right that they don't scatter off the media, only illuminate it.
But you need media photons enabled to get the media lit up by the
photons. Otherwise, there is little reason to have them. Your problems
sound like you didn't have enough photons. It sounds like things are
slow enough as they are, though.
What is your machine? My experiments on my 350MHz Power Mac were slow,
but not that slow.
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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On Fri, 17 Jan 2003 16:47:52 -0500, Christopher James Huff wrote:
> In article <1qg778hvie6b9.1f5fm3o7pau3t$.dlg@40tude.net>,
> Greg Edwards <edw### [at] hotmailcom> wrote:
>
>> Nope. Using photons created odd lines in the scene and broke the effect. I
>> think that POV's photons just deposit themselves in media but don't
>> actually scatter volumetrically.
>
> You are right that they don't scatter off the media, only illuminate it.
> But you need media photons enabled to get the media lit up by the
> photons. Otherwise, there is little reason to have them. Your problems
> sound like you didn't have enough photons. It sounds like things are
> slow enough as they are, though.
> What is your machine? My experiments on my 350MHz Power Mac were slow,
> but not that slow.
When I did my photons render, it DID get illuminated. I think I must have
exaggerated when I said "odd lines". The only problem was that the
subsurface scattering effect became diminished. I just thought it looked
nicer with photons disabled for this object (and render times were insane
(sorry, no numbers)). BTW, my system is a P3 866 and 256MB RAM running XP.
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