I use POV-Ray for rendering 3D isosurfaces and spatial extents from
volumetric data for various quantum molecular electronic properties such as
orbital density, electrostatic potentials, etc.

POV-Ray is primarily a 3D surface modeler.  Virtually all the work you see
from POVRay utilizes surfaces generated from primitive shapes or
isosurfaces.  You could generate an isosurface from your volumetric data and
render that. There is a patch for POVRay that will generate isosurfaces from
volumetric data. Also, POVRay has just introduced a 'volumetric rendering'
capability called media.  I have used it for volumetric rendering but have
found it to be unsatisfying for if one wishes to discern structural
information within the volume being rendered.  I find a combination of
isosurfaces and media to be best for my uses.

After examination of your images, it would seem they may be amenable to
isosurfacing and then rendering with POVRay.  I'd suggest you give it a try!
If you need any help, feel free to contact me.

--
Jim

Check out my web site http://www.kressworks.com/
It'll blow your mind (politically), stimulate your senses (artistically)
and provide scientific insights that boggle the mind!!


Christian Wietholt wrote in message <3731C30F.B44F2F04@image.bien.mu.edu>...
>Hi,
>
>I am chris, and I would like to find a good tool to render large
>image volumes from a CT scanner. The volumes I am working
>with are in raw data and have a size of about 500x500x500 voxel.
>
>I allready did some segmentation with it on my SGI O2 so that
>I have binary volumes. I can store them with 8 Bit per voxel or
>with 1 Bit per Voxel. After the segmentation I render theses
>volumes with IDL on a NT machine. The result you can see on
>my webpage:
>
>    http://perception.bien.mu.edu/~chris
>
>But I would like to render them on my SGI instead an now I am
>looking for a nice tool to render these volumes. Of course there
>is IDL for IRIX, but not in our department, and is IDL really a
>nice tool ?? So I heard about povray and I would like to know
>if there is any chance to do this job by using PovRay?
>
>I will appreciate any help or commands.
>
>    chris
>
>
>
>

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