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So, here's my first spin on trying to model a sitting cat. I'm using pure
POV-Ray blob for this one, but I might go with a few macros and scripts of
my own to attach some internally generated meshes (yes, I'm that weird and
don't use an external modeller).
In case anyone's interested, I'm using blob in order to later increase the
size via the threshold, and thus create a layer in which I can place some
media-generated fur. Or, if that fails to work as I'd like it to, I'll
probably take a week off my PC and try to shoot thousands of hair strands at
the cat to give it some fur...
The cat need not be photorealistic (or I would have given up straight away)
and it won't take up that much image-space, even though it is a central
focus for the image's meaning. I just hope to get a proper cat face done.
And a nice scarf to wrap around it's neck. :-)
Comments and suggestions welcome!
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
Post a reply to this message
Attachments:
Download 'cat_1.jpg' (11 KB)
Preview of image 'cat_1.jpg'
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JUSTTHELOWERCASE:timISNOTnikias(at)gmx.netWARE
news:41939bed@news.povray.org
> In case anyone's interested, I'm using blob in order to later increase
> the size via the threshold, and thus create a layer in which I can
> place some media-generated fur. Or, if that fails to work as I'd like
> it to, I'll probably take a week off my PC and try to shoot thousands
> of hair strands at the cat to give it some fur..
Imho You cold get better results using isosurface soheres + blob formula
(described in tutorial on isosurface). But I would leave pure blob for
preview mode.
As for fure - check out MegaPov :)
--
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics
Post a reply to this message
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> Imho You cold get better results using isosurface soheres + blob formula
> (described in tutorial on isosurface). But I would leave pure blob for
> preview mode.
Could you explain why using isosurfaces with blob formula would be any
better than using the blob directly? I'm not sure I can follow what you're
actually suggesting: switching one object for another? For what reason?
> As for fure - check out MegaPov :)
Does it have a feature to add fur? Or some special media? In any case, I
like to fiddle around using the official version. Makes it much easier to
keep track which versions and compiles to keep for older images in case
something gets changed in a later version.
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
Post a reply to this message
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> Could you explain why using isosurfaces with blob formula would be any
> better than using the blob directly? I'm not sure I can follow what you're
> actually suggesting: switching one object for another? For what reason?
Isosurface blobs can avoid the "seam" effect between blob spheres that you
get with normal blobs.
> Does it have a feature to add fur?
Mega-POV has a "fur" feature which may be worth checking out.
- Slime
[ http://www.slimeland.com/ ]
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So, here's my first attempt at creating a fur texture. Fiddling with media
showed that I would need lots of tests and then still everything would be
dependant on the lighting. As I want to keep my options open and the
rendertimes low, I've resorted to using an average texture. Works rather
fast, though I intend to fiddle around some more to see if I can get some
more interesting and realistic effects, this might increase the rendering
time again... Requires at least one light-source to cause specular
highlights on the fur.
The pigment is just a test, I'm planning to use trace() and position a
colored blob onto the cat, then use the image-function, blur that and use
that as a basis. That way, I can texture the back of the cat different than
the belly, and need not worry about projections (e.g. when using gradients
to get a different color on the spine than on the rest, the color would show
up on the belly as well).
The technique used to create the fur/velvet effect is very simple, my main
idea was to create specular highlights with a positive pigment, and then
subtract some of the highlights using a negative pigment, thus creating that
fur/velvet look. I've later remembered Rune's fur and had a look at it, and
it does it pretty much the same way... Funny coincidence, as Rune and I
always tend to work on similiar include-files, though at different times.
Sometimes he's first, sometimes I am. :-)
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
Post a reply to this message
Attachments:
Download 'cat_1furred.jpg' (17 KB)
Preview of image 'cat_1furred.jpg'
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Really good. Looking forward to see how this one will turn out.
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fak### [at] email address news:4193b5c3$1@news.povray.org
> Isosurface blobs can avoid the "seam" effect between blob spheres that
> you get with normal blobs.
You might find this usefull:
http://www-public.tu-bs.de:8080/~y0013390/pov/ic/docu02.html#EBlob
--
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics
Post a reply to this message
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You've got the stance right Tim, I think it works fine. Liking the
fur already... :)
~Steve~
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> You've got the stance right Tim, I think it works fine. Liking the
> fur already... :)
Thanks, at least I know that I'm heading in the right direction!
I've got no cats around at home and neither do any of my friends, so I have
to make do with whatever reference images I can find. Now that I've got a
bunch of images of various cats, along with a few skeleton images, it's
easier for me to visualize the "structure" underneath the cat and thus,
model it to look properly. Of course, the cat cannot be animated, and if I
decide to make a standing cat, I'd have to model a new one. But, to be
honest, once you get some things figured out, it's rather easy modelling
with blobs...
As for the fur, I hope to come up with a nice texture for it. Still
searching for the proper cat. Can't have too much black (you lose some
visual depth if you show only black areas...) and neither too much white
(doesn't fit well with snow unless the snow is slightly blueish). We'll see.
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
Post a reply to this message
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definately looks very cat-like. i would say that the front legs are a little
bit too far out (not straight up and down enough), as though the cat were
sitting on a smooth surface and it's paws started slipping forward. But
that's just a memory i have of all the cats I know. They always looked like
they were sitting very upright.
very good. looks great.
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