Hi everyone. A couple weeks back I made a fairly convincing granite 
texture with approximated pigment and finish values for its three main 
constituents (quartz, feldspar, mica). I didn't have a proper scene for 
it until today :)

The scene depicts a granite sphere broken in two by a heightfield. In 
the center there lies something you usually don't find smack-dab in the 
middle of common granite: a blood-red corundum; a ruby.

The scene took one hour, twenty-six minutes to render on my resurrected 
P4 1.6ghz computer. There are two 2x2 area_lights which would normally 
be very grainy, but since I added focal blur also, the grainyness almost 
completely disappeared.

Questions, comments?

-Samuel Benge

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Attachments:
Download 'broken_granite2.jpg' (76 KB)

Preview of image 'broken_granite2.jpg'

Nice one. Real convincing, even if it would be unlikely. Has good
photorealism.

I wonder if rerendering this as an image_map and using either interpolation
or AA (or both) would help the ruby any. The white jaggies are a little
distracting, because at first thought it looked as though you were showing a
piece of artificial stuff found inside a rock.

-- 
Bob H.
http://www.3digitaleyes.com

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stb### [at] hotmailcom news:405### [at] hotmailcom

> Questions, comments?

I realy like it :)

Would You mind if I will try to make quite simmilar image - nice concept? 
:)

-- 
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics

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Incredible !

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Hughes, B. wrote:

> Nice one. Real convincing, even if it would be unlikely. Has good
> photorealism.


Thanks.

 
> I wonder if rerendering this as an image_map and using either interpolation
> or AA (or both) would help the ruby any. The white jaggies are a little
> distracting, because at first thought it looked as though you were showing a
> piece of artificial stuff found inside a rock.
> 
> 

Bob, the white jaggies were not a result of poor antialiasing 
techniques. Look closely and you'll see the antialiasing is really quite 
high because of the focal blur. Silly me, I didn't raise the resolution 
of the heightfield used to make the ruby (6 HFs & 2 planes, intersected) 
before rendering. By the time I noticed them, the render was already 
half finished :(

-Samuel Benge

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Rafal 'Raf256' Maj wrote:

> I realy like it :)


Thank you.

 
> Would You mind if I will try to make quite simmilar image - nice concept? 
> :)


Rafal, as far as I'm concerned, these newsgroups are for sharing ideas 
freely! Render to your heart's content :)

-Samuel Benge

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Very nice and very convincing!  Of course we have plenty of those geodes
aorund where I live but they usually have a nice green beryl instead.

:)

Patrick Dugan


"Samuel T. Benge" <stb### [at] hotmailcom> wrote in message
news:405### [at] hotmailcom...
> Hi everyone. A couple weeks back I made a fairly convincing granite
> texture with approximated pigment and finish values for its three main
> constituents (quartz, feldspar, mica). I didn't have a proper scene for
> it until today :)
>
> The scene depicts a granite sphere broken in two by a heightfield. In
> the center there lies something you usually don't find smack-dab in the
> middle of common granite: a blood-red corundum; a ruby.
>
> The scene took one hour, twenty-six minutes to render on my resurrected
> P4 1.6ghz computer. There are two 2x2 area_lights which would normally
> be very grainy, but since I added focal blur also, the grainyness almost
> completely disappeared.
>
> Questions, comments?
>
> -Samuel Benge
>


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----

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"Samuel T. Benge" <stb### [at] hotmailcom> wrote in message
news:405### [at] hotmailcom...
> Hughes, B. wrote:
>
> > I wonder if rerendering this as an image_map and using either
interpolation
> > or AA (or both) would help the ruby any.
>
> Bob, the white jaggies were not a result of poor antialiasing
> I didn't raise the resolution
> of the heightfield used to make the ruby (6 HFs & 2 planes, intersected)
> before rendering.

I wouldn't have guessed it was also made up of HF's, only the broken rock
when you described it. Looks like a collection of slightly varied hexagonal
prisms in a row.

Bob H.

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"Samuel T. Benge" <stb### [at] hotmailcom> wrote in message
news:405### [at] hotmailcom...
> Hi everyone. A couple weeks back I made a fairly convincing granite
> texture with approximated pigment and finish values for its three main
> constituents (quartz, feldspar, mica). I didn't have a proper scene for
> it until today :)
>
> The scene depicts a granite sphere broken in two by a heightfield. In
> the center there lies something you usually don't find smack-dab in the
> middle of common granite: a blood-red corundum; a ruby.
>
> The scene took one hour, twenty-six minutes to render on my resurrected
> P4 1.6ghz computer. There are two 2x2 area_lights which would normally
> be very grainy, but since I added focal blur also, the grainyness almost
> completely disappeared.
>
> Questions, comments?
>
> -Samuel Benge


Awesome technique! I learned from this one.

-- 
- Respectfully,
Dan
http://<broken link>

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This is very good stuff!!

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