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This is my feeble attempt at recreating Henric Wann Jensen's cool "classic
cardioid" caustic pattern (http://www.gk.dtu.du/home/hwj/ and
http://www.gk.dtu.dk/home/hwj/pictures/metalring.jpg) using Nathan Kopp's
Photon Patch for POV-Ray (http://www.nathan.kopp/photons.htm).
The problem with this (did I say feeble) attempt, is that as you can see,
the ray's are almost focused, but not quite. This is simply because the
light source is a skosh too high (as you can also see when you compare the
length of the shadow behind the object with the shadow in HWJ's version.
But... if I try to bring the light up any higher, all of the caustics
disappear. I'm lost and confused.
By the way, I can see why HWJ used a wood-grain table setting. It really
does bring out the caustic effect. I just grabbed one of the standard wood
textures from the POV includes, but it gives the desired effect.
Post a reply to this message
Attachments:
Download 'DavesRing.pov.txt' (3 KB)
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Nathan suggested I set autostop to 45. I tried it and it works! (see image
ins povray.binary.images) Here's the updated source.
David Cook <nos### [at] home com> wrote in message
news:36f71cea.0@news.povray.org...
> This is my feeble attempt at recreating Henric Wann Jensen's cool "classic
> cardioid" caustic pattern (http://www.gk.dtu.du/home/hwj/ and
> http://www.gk.dtu.dk/home/hwj/pictures/metalring.jpg) using Nathan Kopp's
> Photon Patch for POV-Ray (http://www.nathan.kopp/photons.htm).
>
> The problem with this (did I say feeble) attempt, is that as you can see,
> the ray's are almost focused, but not quite. This is simply because the
> light source is a skosh too high (as you can also see when you compare the
> length of the shadow behind the object with the shadow in HWJ's version.
> But... if I try to bring the light up any higher, all of the caustics
> disappear. I'm lost and confused.
>
> By the way, I can see why HWJ used a wood-grain table setting. It really
> does bring out the caustic effect. I just grabbed one of the standard wood
> textures from the POV includes, but it gives the desired effect.
Post a reply to this message
Attachments:
Download 'DavesRing2.pov.txt' (2 KB)
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