Hi again!

My goal was to increase the realism of height_field rocks by separately 
texturing the edges, the sides, and the inside edges of the formation.

To meet this goal I employed an edge-finding pigment to determine the 
outside and inside edges of the rocks, and then used it as a patterned 
texture_map. To save time on the final render, I used Rune's illusion 
include library to project the edge data onto the rocks at render time.

The scene was rendered with low radiosity settings. Slight noise and a 
black border were added with the Gimp. I gave it a final pass with a 
POV-based, luminous color bleeding effect.

I still have farther to take this technique. Is it looking promising so 
far? Questions, comments, appreciated as always~

~Sam

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Attachments:
Download 'rocks.jpg' (147 KB)

Preview of image 'rocks.jpg'

I am not sure I understand the whole procedure, but the result is 
simply amazing !

tuabiht



> Hi again!
> 
> My goal was to increase the realism of height_field rocks by separately 
> texturing the edges, the sides, and the inside edges of the formation.
> 
> To meet this goal I employed an edge-finding pigment to determine the 
> outside and inside edges of the rocks, and then used it as a patterned 
> texture_map. To save time on the final render, I used Rune's illusion 
> include library to project the edge data onto the rocks at render time.
> 
> The scene was rendered with low radiosity settings. Slight noise and a 
> black border were added with the Gimp. I gave it a final pass with a 
> POV-based, luminous color bleeding effect.
> 
> I still have farther to take this technique. Is it looking promising so 
> far? Questions, comments, appreciated as always~
> 
> ~Sam
> 
> ------------------------------------------------------------------------
>

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Yes, this looks very good indeed!
Looks like an isosurface in fact. Not sure I really understand the 
technique, though. Do you plan to provide us with a little tutorial when you 
are done? That would be very much appreciated indeed.

Thomas

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"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> Yes, this looks very good indeed!
> Looks like an isosurface in fact. Not sure I really understand the
> technique, though. Do you plan to provide us with a little tutorial when you
> are done? That would be very much appreciated indeed.

I agree with Thomas - looks wonderful, but er, run that past me again? :)
Rock is so hard to get right. The only satisfactory solution I have found
is isosurfaces, which carry their own problems. I like the lack of scale
here - these could easily be either the size of steps, or vast towering
slabs. Keep it up!

Bill

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Samuel Benge wrote:

> Hi again!
> 
> My goal was to increase the realism of height_field rocks by separately
> texturing the edges, the sides, and the inside edges of the formation.
> 
> To meet this goal I employed an edge-finding pigment to determine the
> outside and inside edges of the rocks, and then used it as a patterned
> texture_map. To save time on the final render, I used Rune's illusion
> include library to project the edge data onto the rocks at render time.
> 
> The scene was rendered with low radiosity settings. Slight noise and a
> black border were added with the Gimp. I gave it a final pass with a
> POV-based, luminous color bleeding effect.
> 
> I still have farther to take this technique. Is it looking promising so
> far? Questions, comments, appreciated as always~
> 
> ~Sam

Wonderful! Looks exactly like some broken concrete blocks I saw in a parking
area a while ago.

How about doing a tut on the procedure to make them...? (Hint hint!)

VERRY nice.
-- 
Stefan

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"Bill Pragnell" <bil### [at] hotmailcom> wrote in message 
news:web.4696030ee03da59e731f01d10@news.povray.org...

 I like the lack of scale
> here - these could easily be either the size of steps, or vast towering
> slabs. Keep it up!

    Definately, I'll go with that.


     ~Steve~



>
> Bill
>

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Thibaut Jonckheere wrote:
> 
>     I am not sure I understand the whole procedure, but the result is 
> simply amazing !

Thanks! I can still take it farther, to produce something more 
realistic. Better radiosity would help, but I'm not patient enough for 
anything over 2 hours, at the moment.

~Sam

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Thomas de Groot wrote:
> Yes, this looks very good indeed!
> Looks like an isosurface in fact. Not sure I really understand the 
> technique, though. Do you plan to provide us with a little tutorial when you 
> are done? That would be very much appreciated indeed.
> 
> Thomas

I could make a tutorial, yes. It would be an honor for people to use it!

~Sam

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Bill Pragnell wrote:

> I agree with Thomas - looks wonderful, but er, run that past me again? :)

Thanks. I'll just have to make a tutorial. It would be easer to explain 
the process visually (I'm a visual learner myself).

> Rock is so hard to get right. The only satisfactory solution I have found
> is isosurfaces, which carry their own problems.

Isosurfaces. Yeah. Two major reasons I don't use them for this kind of 
thing: long render times, floating rocks. When I get a new computer, I 
might be inclined to go back to them.

> I like the lack of scale
> here - these could easily be either the size of steps, or vast towering
> slabs. Keep it up!

I will! thanks!

~Sam

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Stefan Viljoen wrote:
  > Wonderful! Looks exactly like some broken concrete blocks I saw in a 
parking
> area a while ago.

I called it rhyolite (volcanic ash/cement) after I rendered it.... it 
can be anything, really :)

> How about doing a tut on the procedure to make them...? (Hint hint!)

I think I will.

> VERRY nice.

Thanks!

~Sam

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