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13 Nov 2024 17:45:50 EST (-0500)
  grass (Message 1 to 10 of 10)  
From: scott
Subject: grass
Date: 11 Jul 2007 07:12:31
Message: <4694bb1f@news.povray.org>
Just a quick grass macro I wrote yesterday afternoon.  It generates a number 
of different mesh2 objects for each blade of grass, and then puts them 
randomly onto a plane many times over.  Render times were about 20 mins for 
the close-up, and an hour for the mowed grass (on and old P4 3GHz).


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Attachments:
Download 'grass4.jpg' (220 KB) Download 'grass3.jpg' (118 KB)

Preview of image 'grass4.jpg'
grass4.jpg

Preview of image 'grass3.jpg'
grass3.jpg


 

From: nemesis
Subject: Re: grass
Date: 11 Jul 2007 13:55:01
Message: <web.4695196347364445f48316a30@news.povray.org>
very smooth and good-looking!


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From: Christian Froeschlin
Subject: Re: grass
Date: 11 Jul 2007 15:10:05
Message: <46952b0d@news.povray.org>
Looks great, especially the close-up! It seems a bit like it has
focal blur but if the render was only 20 minutes it's probably
just an anti-aliasing effect.


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From: William Tracy
Subject: Re: grass
Date: 11 Jul 2007 21:42:25
Message: <46958701$1@news.povray.org>
Christian Froeschlin wrote:
> Looks great, especially the close-up! It seems a bit like it has
> focal blur but if the render was only 20 minutes it's probably
> just an anti-aliasing effect.

Mm, you can hack focal blur to render in that amount of time. The image 
looks like it could use some more samples in the blurring, actually, 
which would explain the fast rendering time. :-)

-- 
William Tracy
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You know you've been raytracing too long when you've convinced your boss 
that raytracing is really an integral part of your job title (and you 
really don't work in a position that requires it).
Quietly Watching


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From: scott
Subject: Re: grass
Date: 12 Jul 2007 04:08:14
Message: <4695e16e@news.povray.org>
>> Looks great, especially the close-up! It seems a bit like it has
>> focal blur but if the render was only 20 minutes it's probably
>> just an anti-aliasing effect.
>
> Mm, you can hack focal blur to render in that amount of time. The image 
> looks like it could use some more samples in the blurring, actually, which 
> would explain the fast rendering time. :-)

Yeh, IIRC I only used 20 or 30 samples for the focal blur, it actually came 
out better and faster than using AA at a high enough level to look good.


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From: Warp
Subject: Re: grass
Date: 12 Jul 2007 05:45:12
Message: <4695f828@news.povray.org>
scott wrote:
> Just a quick grass macro I wrote yesterday afternoon.  It generates a
> number of different mesh2 objects for each blade of grass, and then puts
> them randomly onto a plane many times over.

  It would save memory if you created a big group of blades as a single
mesh2. Perhaps create a half dozen of such groups and then create the
entire grassfield with randomly chosen groups.


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From: Rarius
Subject: Re: grass
Date: 12 Jul 2007 13:59:46
Message: <46966c12@news.povray.org>
Very nice!

Any chance of a peek at the code?

Rarius

"scott" <sco### [at] spamcom> wrote in message news:4694bb1f@news.povray.org...
> Just a quick grass macro I wrote yesterday afternoon.  It generates a 
> number
> of different mesh2 objects for each blade of grass, and then puts them
> randomly onto a plane many times over.  Render times were about 20 mins 
> for
> the close-up, and an hour for the mowed grass (on and old P4 3GHz).
>
>


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From: scott
Subject: Re: grass
Date: 13 Jul 2007 03:47:47
Message: <46972e23@news.povray.org>
> Very nice!
> 
> Any chance of a peek at the code?

Sure, I posted it in p.b.s-f.


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From: Grassblade
Subject: Re: grass
Date: 13 Jul 2007 13:25:01
Message: <web.4697b4db473644451ece12af0@news.povray.org>
Wow, that's good! My only criticism is that the mown grass has a pointy tip.
Or at least, I _think_ I can detect a pointy tip.

And thanks for the code, BTW.


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From: scott
Subject: Re: grass
Date: 16 Jul 2007 04:08:30
Message: <469b277e$1@news.povray.org>
Yes you're right!  I hadn't thought of that...


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