Found this link in the Rhino newsgroup:

http://graphics.uni-konstanz.de/~luft/ivy_generator/

It will let you input objects in OBJ format, place the ivy "seed" and 
then grow the ivy on/around the object. It does a very good job. And 
it's free.

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"Tim Riley" <timothyrileyatnetscapedotnet> schreef in bericht 
news:45f9bf98@news.povray.org...
> Found this link in the Rhino newsgroup:
>
> http://graphics.uni-konstanz.de/~luft/ivy_generator/
>
> It will let you input objects in OBJ format, place the ivy "seed" and
> then grow the ivy on/around the object. It does a very good job. And
> it's free.
>

That looks excellent! Thanks for sharing.

Looks like my own simple solution is totally obsolete now... 
http://news.povray.org/povray.binaries.images/message/%3C45db09a8%40news.povray.org%3E/#%3C45db09a8%40news.povray.org%3E

:-)

THomas

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"Tim Riley" <timothyrileyatnetscapedotnet> wrote in message 
news:45f9bf98@news.povray.org...
> Found this link in the Rhino newsgroup:
>
> http://graphics.uni-konstanz.de/~luft/ivy_generator/
>
> It will let you input objects in OBJ format, place the ivy "seed" and
> then grow the ivy on/around the object. It does a very good job. And
> it's free.
>

OMG!  This is amazing.  Now I guess I know what I'll be doing this weekend. 
:-)

Thanks for the post!

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Tim Riley wrote:
> http://graphics.uni-konstanz.de/~luft/ivy_generator/

Oh, thanks! Your image is a bit dark, though. Probably the allmighty
gamma correction is to blame (again :)

The funny thing is: I'm at the university of Konstanz, too, and I'm even
 currently working in the faculty where Thomas Luft (the guy who wrote
the generator) works... Didn't know about the generator, though :) But
these guys do nice stuff here: The leading professor is one of the
founders of GreenWorks (who develop XFrog).


Regards,
Florian

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"Tim Riley" <timothyrileyatnetscapedotnet> wrote

> Found this link in the Rhino newsgroup:
>
> http://graphics.uni-konstanz.de/~luft/ivy_generator/

Looks promising, but the display is horrendously slow (<0.1 fps).

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"Jeremy M. Praay" <jer### [at] questsoftwarecmo> wrote in message 
news:45fad9ca$1@news.povray.org...
>
> OMG!  This is amazing.  Now I guess I know what I'll be doing this 
> weekend.
> :-)
>

It took quite a few tries to figure out how to make it work, but I thought 
this turned out pretty good.  Now I just need to include it in a "real" 
scene.

After importing into Pose-Ray, I had to also create transparency maps, 
otherwise the shiny leaf surfaces became square.  I'm not aware of another 
way around this.  I also had to rotate the leaves 180 degrees, and I may a 
few other more subtle changes.  But for the most part, it was not difficult 
to do.  I recommend reading the readme.txt before you use the Ivy Generator, 
though.  It will save you a few minutes of trying to figure out the 
interface on your own.

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"Jeremy M. Praay" <jer### [at] questsoftwarecom> schreef in bericht 
news:45fbf6f5@news.povray.org...
> "Jeremy M. Praay" <jer### [at] questsoftwarecmo> wrote in message 
> news:45fad9ca$1@news.povray.org...
>>
>> OMG!  This is amazing.  Now I guess I know what I'll be doing this 
>> weekend.
>> :-)
>>
>
> It took quite a few tries to figure out how to make it work, but I thought 
> this turned out pretty good.  Now I just need to include it in a "real" 
> scene.
>
> After importing into Pose-Ray, I had to also create transparency maps, 
> otherwise the shiny leaf surfaces became square.  I'm not aware of another 
> way around this.  I also had to rotate the leaves 180 degrees, and I may a 
> few other more subtle changes.  But for the most part, it was not 
> difficult to do.  I recommend reading the readme.txt before you use the 
> Ivy Generator, though.  It will save you a few minutes of trying to figure 
> out the interface on your own.
>
Yes, I also found out about the transparency maps. I had not yet discovered 
the rotation though. The output files can become fairly large (I have now 
one of about 200mb) and that takes time to process. So it may be a good idea 
to do it in rather small bunches of ivy perhaps.
Also, what I found disconcerting is that the sliders do the contrary to what 
you expect. So, increasing the leaf slider decreases the number of leaves!!! 
and so for most of them. It may be me though....

Thomas


Thomas

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"Thomas de Groot" <t.d### [at] internlDOTnet> wrote in message 
news:45fc094b$1@news.povray.org...
> Yes, I also found out about the transparency maps. I had not yet 
> discovered the rotation though. The output files can become fairly large 
> (I have now one of about 200mb) and that takes time to process. So it may 
> be a good idea to do it in rather small bunches of ivy perhaps.
> Also, what I found disconcerting is that the sliders do the contrary to 
> what you expect. So, increasing the leaf slider decreases the number of 
> leaves!!! and so for most of them. It may be me though....
>

Yeah, I just started playing with the sliders.  "leaf probability" is 
another one.  If you increase it, there are fewer leaves.

Nevertheless, I'm having a ton of fun with this.  And I've already begun to 
incorporate it into an existing scene that I was working on.  :-)

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Works perty good after tweaking a bit.

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Nice! Thank you Tim!

Although the leaves don't like atmospheric media and spotlights, they look 
good in a bog standard area-light.

   ~Steve~

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