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Hi all,
I am totally new to POV-ray, but the images totally blow me away.
Especially these two (as I work in forestry):
http://www.povray.org/community/hof/Bush.php
http://hof.povray.org/Boreal_big.html
I have a few basic questions to try and help me figure out if POV-ray will
work for my profession.
1. I know that GRASS GIS (http://grass.itc.it/) has an export to POV-ray.
SO, if I had POV point coordinates for 15,000 objects (much fewer would be
visible) planted on a DEM for an entire landscape. Would the render be
possible or practical without a render farm? The objects are Xfrog trees.
2. Same scenario, only with many more objects. Say 500,000 trees, shrubs
and grasses. Would such a render be possible?
I would very much like to apply this level or realism to my projections.
Basically, I run models of how tree stands will change over time, with
certain variables (thinning based on species/size, fire, insect
infestation...) I think with enough work, I might be able to apply the
mathematics into POVray. Which would be great!
Thanks all!
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Povray is a good tool for what you want to achieve.
In http://www.irtc.org/ftp/pub/stills/2006-06-30/hideaway.jpg I used abouut
200000 plant meshes, which needed about 1.2 GB RAM. This gives you an
impression about RAM needed for 500000 plants. You should consider about
limiting data to visible plants. In
http://news.povray.org/povray.binaries.images/message/%3C43236855%40news.povray.org%3E/#%3C43236855%40news.povray.org%3
E
only 75000 visible trees are used.
Your vegetation simulation attempt sounds very interesting. In fact I'm
working on something similar within Povray -
http://news.povray.org/povray.binaries.images/message/%3Cweb.44b62d56a7a9ea94c436b710%40news.povray.org%3E/#%3Cweb.44b6
2d56a7a9ea94c436b710%40news.povray.org%3E
..
Please post more of this approach.
Norbert Kern
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Excellent images! I am especially interested in the image map (POV logo).
That could have many applications for me. For example, overlay raster
images of disease and fire mortality (perimeter).
This is the most difficult problem I think:
* Is it possible to populate defined polygonal areas with objects?
* If so, how are these polygons created/described?
I will experiment with GRASS GIS and POV until I understand their
relationship more. Still, I am very excited!
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JohnnyH nous apporta ses lumieres en ce 01/11/2006 17:16:
> Excellent images! I am especially interested in the image map (POV logo).
> That could have many applications for me. For example, overlay raster
> images of disease and fire mortality (perimeter).
> This is the most difficult problem I think:
> * Is it possible to populate defined polygonal areas with objects?
It's possible, and there are many possible ways to do that.
> * If so, how are these polygons created/described?
There is the polygon primitive that let you deffine an arbitrary, straight
edged, flat shape. You can also use a prism, similar but with a thickness.
> I will experiment with GRASS GIS and POV until I understand their
> relationship more. Still, I am very excited!
--
Alain
-------------------------------------------------
My toes were playing the piano under the blankets.
They made so much noise that I woke up singing.
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I can imagine several ways to describe polygons, which can be populated, but
none of them are very easy. It depends, how your landscape and your camera
is defined.
For a beginning, look at the source of the povlogo forest image:
http://news.povray.org/povray.binaries.scene-files/message/%3C432414bf%40news.povray.org%3E/#%3C432414bf%40news.povray.
org%3E
Norbert Kern
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