POV-Ray : Newsgroups : povray.binaries.images : Snowy mountain Server Time
11 Aug 2024 03:32:17 EDT (-0400)
  Snowy mountain (Message 1 to 3 of 3)  
From: Vincent LE CHEVALIER
Subject: Snowy mountain
Date: 24 May 2004 07:54:24
Message: <40b1e270@news.povray.org>
Hello !

Just managed to create this. The terrain is a blend between image data 
and a granite pattern. I had to write a cubic interpolation script 
myself since it is apparently not available yet in POV... There still 
are some artifacts, but it used to be quite worse.

I guess I'll have to add some clouds now. But I'm having a hard time 
with media...

Comments and suggestions welcomed

-- 
Vincent


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From: Samuel Benge
Subject: Re: Snowy mountain
Date: 24 May 2004 16:30:32
Message: <40B25B19.50201@hotmail.com>
Vincent LE CHEVALIER wrote:

> Hello !


Hi!


> Just managed to create this. The terrain is a blend between image data 
> and a granite pattern. I had to write a cubic interpolation script 
> myself since it is apparently not available yet in POV... There still 
> are some artifacts, but it used to be quite worse.
> 
> I guess I'll have to add some clouds now. But I'm having a hard time 
> with media...
> 
> Comments and suggestions welcomed
> 

This is a good example of blending data for height_fields. I think one 
could get away with a lower-resolution image if it was perhaps given 
some turbulence...

Good job on the cubic interpolation... how is it referenced in the POV 
script, 'interpolate 3'?

-Sam Benge


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From: Vincent LE CHEVALIER
Subject: Re: Snowy mountain
Date: 24 May 2004 16:56:45
Message: <40b2618d@news.povray.org>
Samuel Benge wrote:
> This is a good example of blending data for height_fields. I think one 
> could get away with a lower-resolution image if it was perhaps given 
> some turbulence...
> 
> Good job on the cubic interpolation... how is it referenced in the POV 
> script, 'interpolate 3'?

Well, it should be judging from the file image.h in the POV source. But 
as far as I know, it is not implemented in v3.5. So I coded the 
interpolation in POV script language. And obviously it's quite slow 
compared to the built-in interpolation types. But on the other hand, 
this gives me the possibility to tweak the interpolation process...
Anyway, I'm not ready to recompile POV yet. So I guess I'll keep using 
my script ;-)

Thanks for the comments

-- 
Vincent


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