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Thanks to a suggestion by Kari Kivisalo, I got an SEM texture that I like.
Here's how it looks.
Post a reply to this message
Attachments:
Download 'electron3.jpg' (62 KB)
Preview of image 'electron3.jpg'
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The bumpy surface doesn't match the perfect spherical shape.
Try to model it instead of just painting a texture on it.
regards
SY
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Would love to model the displacement instead of just bump mapping, but the
modeler that I am using (wings) doesn't have an option of introducing noise
or turbulence into the mesh. Any ideas on how to perturb a mesh or mesh2
object using noise or turbulence?
John
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> modeler that I am using (wings) doesn't have an option of introducing
noise
> or turbulence into the mesh. Any ideas on how to perturb a mesh or mesh2
I see.
I never use modellers, all the meshes I use are created by using macros. As
soon as you have the triangle coordinates it is easy to adjust the
triangle's coordinates and normals. This gets difficult if you have just an
include file of abitrary structure.
I guess SEM means scanning electron microscope?
What will the final shape be for which you want to use this texture?
regards,
SY
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"John Bradshaw" <joh### [at] nospam hotmailcom> a écrit dans le message
de news: 3c729214@news.povray.org...
> Would love to model the displacement instead of just bump mapping, but the
> modeler that I am using (wings) doesn't have an option of introducing
noise
> or turbulence into the mesh. Any ideas on how to perturb a mesh or mesh2
> object using noise or turbulence?
Note that the commercial version of uvmapper now allows to create displaced
meshes.
http://www.uvmapper.com/uvmpdisp.html
I haven't still bought or used the commercial version, but it looks like a
not too expensive way to create displaced meshes in Povray (until someone
implements it within Povray of course).
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
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You could use the heightfield macro that comes in shapes.inc. Write out the
heightfield vertices to a file, scale them to a proper amount, and transfer
the each vertex of your mesh along its normal by the given height of one of
the HF vertices.
-Shay
John Bradshaw <joh### [at] nospamhotmailcom> wrote in message
news:3c729214@news.povray.org...
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"John Bradshaw" <joh### [at] nospamhotmailcom> wrote in message
news:3c729214@news.povray.org...
> Would love to model the displacement instead of just bump mapping,
> but the modeler that I am using (wings) doesn't have an option of
> introducing noise or turbulence into the mesh. Any ideas on how to
> perturb a mesh or mesh2 object using noise or turbulence?
Don't know what your modelling there, but guess it's something that can't be
expressed as a function? If it could be an isosurface could be nice..
Ari-Matti
Post a reply to this message
Attachments:
Download 'SEM.jpg' (31 KB)
Preview of image 'SEM.jpg'
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Very nice image.
No it can't be expressed as a function (at least not with my rudimentary
math skills). See next post: SEM neurons
John
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Anyway to do it that is $50 less? (yes, I know I'm cheap--actually I'm just
poor or married--they both keep me from spending $50 just like that). Even
an algorithm--I'm on spring break and might have some time to put into it.
John
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in news:3c726ebb@news.povray.org John Bradshaw wrote:
> I got an SEM texture that I like.
>
Here's a SEM image of spheres I made ~15 years ago. It's coffee creamer.
http://members.home.nl/seedseven/creamer.png
Ingo
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Thanks for the reference image. You're the third person that has responded
to my threads that has had experience with SEM. Interesting. I guess I
shouldn't be surprised--pov and SEM (and some other things as well) are
"technical" aspects of visual "art". Anyone else out there?
Yes, the texture has a way to go. I was just happy to get closer for the
moment.
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John Bradshaw wrote:
> Thanks for the reference image. You're the third person that has responded
> to my threads that has had experience with SEM. Interesting. I guess I
> shouldn't be surprised--pov and SEM (and some other things as well) are
> "technical" aspects of visual "art". Anyone else out there?
Partly :)
I do not have much experience with SEM (actually I might get, even as a result
of my experience with POV, so there may be a connection one way or the other).
I am working in medicine though.
Andrel
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>
> I am working in medicine though.
This is OT, but what area of medicine? I'm a med student and do some
deafness research (human genetics-ENT) as well. No SEM experience, although
I have always found SEM images fascinating.
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Hmmm, something to look into. Thanks for the suggestion.
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John Bradshaw wrote:
>
> >
> > I am working in medicine though.
>
> This is OT, but what area of medicine? I'm a med student and do some
> deafness research (human genetics-ENT) as well. No SEM experience, although
> I have always found SEM images fascinating.
Cardiology (ECG signal processing, arrhythmia, image processing,
molecular cardiology, embryology and in fact anything with computers).
Any further comments preferably to my e-mail address, this thread is
going off topic.
Andrel
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