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From: Samuel B 
Subject: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:20:01
Message: <web.5c27f23f2a940bca102e48c00@news.povray.org>
Hello all,


Yeah, so it's been a while. I stop in every once in a while to lurk and see what
everyone's up to. Seems to have calmed down a bit 'round these parts, but it's
nice to know the POV-Ray community still exists (not to mention its one binding
factor).

I haven't really been rendering much lately, but here are some things made
between 2015-17. I hope to pick up some steam again so I don't, you know, die of
boredom and inactivity or something :P

First up is an image of the planet Earth lit up at night. A point light was
placed at the very top of the sphere to project a semi-transparent image onto
the plane... or I used spherical inversion. Can't remember, but the result is
nearly the same either way. The bloom is from a newer technique that uses 2-pass
separable gaussian blur. Faster, but not too flexible.


~Sam


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:30:00
Message: <web.5c27f510555f9722102e48c00@news.povray.org>
Some grass experiments. Blender for the modeling, and POV-Ray for the rendering.
separable gaussian blur-bloom again. If I recall accurately, I used radiosity +
Mr. Lipka's backside illumination for translucency. If it's grainy it's because
I'm impatient. But look at the render times (in the image names). Could be
worse...


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:30:01
Message: <web.5c27f549555f9722102e48c00@news.povray.org>
> grass


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:30:01
Message: <web.5c27f556555f9722102e48c00@news.povray.org>
> grass


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:35:01
Message: <web.5c27f5d3555f9722102e48c00@news.povray.org>
Heightmap + isosurface experiment. Sorta "meh," but promising.


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:40:01
Message: <web.5c27f709555f9722102e48c00@news.povray.org>
Some math-related stuff. Torii rotated around two arbitrary points on a sphere.
Represents one-half of a conformal transformation.


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:45:00
Message: <web.5c27f822555f9722102e48c00@news.povray.org>
More math-related stuff. An image showing an initial circle inversion that makes
possible the construction of an Apollonian gasket. Uploaded because why not ;)


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:45:00
Message: <web.5c27f8ac555f9722102e48c00@news.povray.org>
> More math-related stuff.

If you ever desired a sphere-shaped bump on a plane but also wanted raytraced
perfection, here is an example of the geometry you might consider using. Or you
might just use an isosurface or something...


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From: jr
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:45:00
Message: <web.5c27f8d1555f972248892b50@news.povray.org>
"Samuel B." <stb### [at] hotmailcom> wrote:
> > grass

this one "does it" for me.


regards, jr.


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From: Samuel B 
Subject: Re: Some older renderings from an old POVhead
Date: 29 Dec 2018 22:55:00
Message: <web.5c27fa8a555f9722102e48c00@news.povray.org>
I don't think I ever posted an updated version of the bubbles I was rendering...
My first attempts used blobs, which totally failed to capture the subtleties and
detail of actual minimal surfaces. Unsatisfied, I turned my attention to actual
geometry... only to find even more trouble, since the trade-off always seems to
be: accuracy? or a long render time? choose one.

At any rate, I found out that three surfaces have to meet at 120 degrees if you
want any sort of accuracy in your bubble cluster. This image portrays the
metrics involved for two bubbles.


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