hey guys,
I am attempting to create an image of a laser hitting a crystal lattice,
made of many molecules.

My first attempt has yielded a red colored cylinder whos filter i changed
slightly to give the semblance of a laser.
Unfortunately the camera angle I am using makes the cylinder wider at one
end then the other, and changing the angle is not an option.  How could I
make the cylinder with a more uniform size?

I am also having trouble creating the intersection point of the lattice and
the cylinder, those spheres contained inside the cylinder show up
differently than those that are behind both walls of the cylinder, I tried
to merge the two, but the rendering took far too long.

If there was some way to get rid of the cylinder completely and replace it
with a light source, I would, but I need to make the path the light travels
visible as well, and focus it on a direct spot, is there some way to do
this?

hmm, this is kind of rambling, it is difficult to explain what I am
thinking, if I find an image that makes it more clear I will post a URL.

thank you

Vince

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"vints" <nomail@nomail> wrote:
> hey guys,
> I am attempting to create an image of a laser hitting a crystal lattice,
> made of many molecules.
>

Cool.

> My first attempt has yielded a red colored cylinder whos filter i changed
> slightly to give the semblance of a laser.
> Unfortunately the camera angle I am using makes the cylinder wider at one
> end then the other, and changing the angle is not an option.  How could I
> make the cylinder with a more uniform size?
>

If it looks like that in Pov, that is probably y how it would look IF you
were using an identical camera. You CAN fix this distortion (if it is
camera-based) by moving the camera further back, and then decreasing the
'angle' perameter of the camera. (I did a post on this in the
Advanced-users section, but nobody noticed) The sad bit is that you then
lose depth to your image.


> If there was some way to get rid of the cylinder completely and replace it
> with a light source, I would, but I need to make the path the light travels
> visible as well, and focus it on a direct spot, is there some way to do
> this?
>

Try a transparent cylynder (pigment {rgbt 1}), using 'hollow' and filled
with emmissive media, or a very small light source using 'cylindrical' and
'spot_light' passing through a cylinder that is transparent and 'hollow',
and filled with scattering media (interior{ior 1 media {scattering {...}}})

If you do a search in the Docs for media, you'll begin to get the idea.

-S
5TF!

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hi,

thanks for the help so far, that is exactly what I am looking to create, now
I am having another issue with the lighting.

I figured that first I would create the light that I want to run through the
clear and hollow cylinder, but for some reason the light is not appearing
on the crystal lattice.  When I make the molecules white in color, the
light appears very faintly on the area i want it to appear.  However when I
change to color of the molecules to green, the light is too faint to be
visible, is there a way I can change the strength or intensity of the
light?

thanks vince

Post a reply to this message

"vints" <nomail@nomail> wrote:
> hi,
>
> thanks for the help so far, that is exactly what I am looking to create, now
> I am having another issue with the lighting.
>
> I figured that first I would create the light that I want to run through the
> clear and hollow cylinder, but for some reason the light is not appearing
> on the crystal lattice.  When I make the molecules white in color, the
> light appears very faintly on the area i want it to appear.  However when I
> change to color of the molecules to green, the light is too faint to be
> visible, is there a way I can change the strength or intensity of the
> light?
>
> thanks vince

Well, if it is purely red light on a purely green object, it WON'T show up.
If you use a light whose color is, say, <2, 2, 5> (you can use values more
than 1 to increase intensity), and/or a molecule with color, say, <.25, 1,
..25>, it'll look much brighter.

Hope to aee the result.

-S
5TF!

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