My take on "worlds within worlds". Not very literal, but for a me (my real
job is in medicine), it makes sense. What do you think of the idea?

Also, would like comments on the scanning electron microscope effect. It's
not quite where I want it to be, but getting there. (see previous post SEM
texture)

John

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Attachments:
Download 'neurons.jpg' (81 KB)

Preview of image 'neurons.jpg'

I like it very much! I agree that it does look like an electronic microscope
photograph. I think some minor tweaking will produce a better image, but
you're already on the way!

Congrats,

Fernando.


"John Bradshaw" <joh### [at] nospamhotmailcom> wrote in message
news:3c72e14a@news.povray.org...
> My take on "worlds within worlds". Not very literal, but for a me (my real
> job is in medicine), it makes sense. What do you think of the idea?
>
> Also, would like comments on the scanning electron microscope effect. It's
> not quite where I want it to be, but getting there. (see previous post SEM
> texture)
>
> John
>
>
>

Post a reply to this message

I was thinking about almost the same texture situation: the clothes of that
princess in 'Shrek', did you see that? (I forgot about the name of that
fabric.)
I like that texture.

And I absolutely like that picture! But isn't it a bit too 'clean' and sharp
for a scanning electron microscope?

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"Apache" <apa### [at] yahoocom> wrote in message
news:3c73191d$1@news.povray.org...
> I was thinking about almost the same texture situation: the clothes of
that
> princess in 'Shrek', did you see that? (I forgot about the name of that
> fabric.)
> I like that texture.

Hi Apache,

I think that the texture you're talking about in Spanish is called
"terciopelo", and I think in English is "velvet". I hope someone can confirm
my dubious translation.

Fernando.

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Cool pic!
I like it a lot.

IMHO there should be something in the background, since the SEM probes are
mounted on some surface before they get a gold coat, right?

Very nice, tough!
regards
SY

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Check out www.uq.edu.au/nanoworld they have a database of SEM and TEM
images.  The "Mystery Images" section seems pretty good.

I think people would murder to get real images as good as yours...

Mark Hanford
http://www.mrhanford.com/povray


"John Bradshaw" <joh### [at] nospamhotmailcom> wrote in message
news:3c72e14a@news.povray.org...
> My take on "worlds within worlds". Not very literal, but for a me (my real
> job is in medicine), it makes sense. What do you think of the idea?
>
> Also, would like comments on the scanning electron microscope effect. It's
> not quite where I want it to be, but getting there. (see previous post SEM
> texture)
>
> John
>
>
>

Post a reply to this message

Looks good and I recognize the type of lighting! But I don't know WHY it
looks that way through an .... what did you call it?  Electron microscope..
What's the reason for such a light?


Regards,
Hugo

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"John Bradshaw" <joh### [at] nospamhotmailcom> wrote in message
news:3c72e14a@news.povray.org...
> Also, would like comments on the scanning electron microscope effect. It's
> not quite where I want it to be, but getting there. (see previous post SEM
> texture)

I reviewed that teapot image with an SEM expert and these were our comments
there, many of which would apply to your image...

An SEM has a detector off to one side.  So in effect surfaces which face the
detector will be brighter (higher collection yield) than those which face
away. Your image gives the feeling that the detector is in the center of the
sample, if there's not multiple light sources.

The image rightly shows how surfaces which are normal to the "camera" ie.,
incident beam are brighter. Again, the secondary electron detection yield is
higher as well on these surfaces.   This is a good *pigment*, FWIW.

It looks, however, as if it were stainless steel, with very little beam
penetration into the sample.  Contrast this with "record 22 of 700; Title:
'Blood cell' " in the image gallery at.
http://www.uq.edu.au/nanoworld/images_1.html

For an organic, low-atomic-number sample, I'd expect there to be some
translucency, almost a 'media' effect, as in that blood cell image

The "etched steel" effect in your texture normal is a bit troublesome.  Here
the concern is not so much with SEM physics but with the intuitive feel of
cells: things should be more round, even like "Lung surface: image 39 of
700" at that gallery.


_________
Greg M. Johnson
10-yr SEM user

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> My take on "worlds within worlds". Not very literal, but for a me (my real
> job is in medicine), it makes sense. What do you think of the idea?
>
> Also, would like comments on the scanning electron microscope effect. It's
> not quite where I want it to be, but getting there. (see previous post SEM
> texture)

looks great close up - not so great further away.. hmmm

perhaps a little translucency
--

Rick

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http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA

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Thanks for your comments and perspective of an actual SEM user.

> An SEM has a detector off to one side.  So in effect surfaces which face
the
> detector will be brighter (higher collection yield) than those which face
> away. Your image gives the feeling that the detector is in the center of
the
> sample, if there's not multiple light sources.

I've added another light source about 80 degrees to the right, we'll see if
that helps.

> It looks, however, as if it were stainless steel, with very little beam
> penetration into the sample.  Contrast this with "record 22 of 700; Title:
> 'Blood cell' " in the image gallery at.
> http://www.uq.edu.au/nanoworld/images_1.html

Hmmm, perhaps a little scattering media. Hate to see those render times
though.

> The "etched steel" effect in your texture normal is a bit troublesome.
Here
> the concern is not so much with SEM physics but with the intuitive feel of
> cells: things should be more round, even like "Lung surface: image 39 of
> 700" at that gallery.

Again, I think the biggest problem with the texture is that it is only a
bump map. If I knew of a way to introduce a little noise into my mesh....

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