POV-Ray : Newsgroups : povray.general : media again Server Time
14 Nov 2024 19:19:44 EST (-0500)
  media again (Message 1 to 2 of 2)  
From: Maneesh Yadav
Subject: media again
Date: 30 Apr 1999 23:51:22
Message: <372A6C3A.ABC2426A@my-dejanews.com>
Hi all...I thought I knew how to use media...it worked just the way I
expect on small objects...then in one of my pics I noticed I was getting
wierd colors for really large (r=2000) spheres....

I have a scene (on the order of ~2000 units^3)...and when I use a media
statment outisde any object for an atmosphere I get white speckly
silouhettes of objects tried messing with params (even cut pasted from a
media tutorial) and nothing changed....I don't think my scene is to
bright either...anyone have any hints as to whats going on ?


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From: Bob Hughes
Subject: Re: media again
Date: 1 May 1999 04:39:09
Message: <372AAF54.EC1D8B92@aol.com>
You're basically dealing with large volume, as such making more sampling
necessary to cover it. You could try leaving out 'scattering', which is
the main reason for "speckles" I believe, and use emission and/or
absorption alone.
Try using a larger "environment" sphere or box to surround the entire
scene as well (hollow of course), not a 'sky_sphere' or 'background' by
itself either.
Others may have better advice, so stay tuned just in case.


Maneesh Yadav wrote:
> 
> Hi all...I thought I knew how to use media...it worked just the way I
> expect on small objects...then in one of my pics I noticed I was getting
> wierd colors for really large (r=2000) spheres....
> 
> I have a scene (on the order of ~2000 units^3)...and when I use a media
> statment outisde any object for an atmosphere I get white speckly
> silouhettes of objects tried messing with params (even cut pasted from a
> media tutorial) and nothing changed....I don't think my scene is to
> bright either...anyone have any hints as to whats going on ?

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