On Thu, 16 Jan 2003 09:05:43 -0500, "William F. Pokorny"
<pok### [at] attglobalnet> wrote:
> About 450K objects that just fit in 2G of memory. Slight focal blur. Time about
> 0.5 days. Original image is 2400x3600.     
> The grass is layers of POV-Ray source code with comments stripped and the code
> packed.

nice, what about animation ? :-)

ABX

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"William F. Pokorny" <pok### [at] attglobalnet> wrote in message
news:3E26BC37.8A7C21AB@attglobal.net...

> About 450K objects that just fit in 2G of memory.

Masochist!
I like the idea of this picture. Still looks incomplete, however.

 -Shay

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William F. Pokorny wrote:
> About 450K objects that just fit in 2G of memory.

2G of memory, I am green with envy.  What OS are you using?



> 
> The grass is layers of POV-Ray source code with comments stripped and the code
> packed.
> 
Clever

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Thank you. An animation would be cool, but at 15 days per second... Well, let's
just say you'll have to wait a while to see it.    
> 
> nice, what about animation ? :-)
> 
> ABX

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Shay, Thanks. I was aiming for a simple and clean appearance, but I am certainly
open to suggested improvements.

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Jim, 
I'm green too - I borrowed the unix system used for the full render. My Win98
computer has only 512MB. 
 
> 2G of memory, I am green with envy.  What OS are you using?

> Clever
Thank you.

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William F. Pokorny wrote:
> About 450K objects that just fit in 2G of memory. Slight focal blur. Time about
> 0.5 days. Original image is 2400x3600.     
> 
> The grass is layers of POV-Ray source code with comments stripped and the code
> packed.

Way cool!

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Way cool :)

What percentage of the 450k objects goes to the "grass"?
And are the "rays" just cones or sphere sweeps or something like that?


Best regards


"William F. Pokorny" <pok### [at] attglobalnet> wrote in message
news:3E26BC37.8A7C21AB@attglobal.net...
> About 450K objects that just fit in 2G of memory. Slight focal blur. Time
about
> 0.5 days. Original image is 2400x3600.
>
> The grass is layers of POV-Ray source code with comments stripped and the
code
> packed.


----------------------------------------------------------------------------
----

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Thank you Jari.

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Thanks. 

It ended up with a little over half the objects in the rays. I used sphere
sweeps at first which was terrific for memory and appearance, but even with
Massimo Valentini's performance improvements to the sphere sweep code, it was
really slow. By the way, there are just over 4000 actual rays. I changed to
cones and spheres which helped the performance greatly, but to get a smooth look
I had to use a lot of them!!! 

I'll mention too that this image could be done with fewer objects by figuring
out what is hidden and dropping or simplifying those objects. However, I have in
mind the idea of doing grass with prisms in general and was in part getting a
feel for the limits of POV-Ray in this area.  

The advantage of polygons and prisms for things like grass is that you can stick
a lot of geometry into a small space. I have even put up to 2500 'polygons' into
one prism statement and been able to render it, but as you increase the number
this way the performance drops dramatically. I have yet to look at the source
for polygons and prisms, but I would guess there is not automatic bounding
within the objects and POV-Ray is doing an intersection test for each sub prism
in the prism statement.   

Anyway. just a rough idea for grass with prisms at this point.

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