POV-Ray : Newsgroups : povray.binaries.images : Scattering media with a color_map - how to do? Server Time
23 Jun 2024 14:27:50 EDT (-0400)
  Scattering media with a color_map - how to do? (Message 11 to 12 of 12)  
<<< Previous 10 Messages Goto Initial 10 Messages
From: Jörg 'Yadgar' Bleimann
Subject: Re: Scattering media with a color_map - how to do?
Date: 23 Nov 2009 09:13:25
Message: <4b0a9885$1@news.povray.org>
High!

clipka wrote:

> "There may be from 2 to 256 entries in the map.
> 
> Density maps may be nested to any level of complexity you desire. The 
> densities in a map may have color maps or density maps or any type of 
> density you want."

Do they? I tried a density_map composed of six entries, which in turn 
are color_maps, and got this:

"Expected ']', colour map identifier found instead"

How do I have to define the six color maps to avoid such errors?

See you in Khyberspace!

Yadgar


Post a reply to this message

From: Alain
Subject: Re: Scattering media with a color_map - how to do?
Date: 23 Nov 2009 12:27:10
Message: <4b0ac5ee$1@news.povray.org>

> Some off-topic: The ring's shadow over the planet surface show other shape in
> the real Saturn, you can see this in some real photos of the planet.
> 
> http://www.jpl.nasa.gov/images/saturn/saturn1208-browse.jpg
> 
> Maybe if you scale all the scene 10.000 in size and put the light source very
> very far, the shadow appear more real.
> 

You don't need to put the light_source "very very far", you just need to 
use a parallel light_source and place it much closer, but outside the 
rings/satellites system.

Don't forget that Saturn is not solid, but a gas giant. You can simulate 
that using SSLT in the beta version or very dense scattering media with 
NO emissive media.


Alain


Post a reply to this message

<<< Previous 10 Messages Goto Initial 10 Messages

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.