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Jerry <jer### [at] acusd edu> wrote in message
news:jerry-8238F3.07470008032000@news.povray.org...
>
> >Well, the watch is now more or less finished, I just need to tweak the
> >metal texture a bit, it's too white.
>
> It might be simply that there isn't anything for it to reflect. Metal
> textures tend to look white when viewed outside of a scene. I usually
> like to stick a couple of busy planes outside of the camera's view for
> the metal to reflect.
>
A POV bug? - when I look at a reflective surface in real life, there's
always something being reflected ;)
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Ken wrote:
> Kari Kivisalo wrote:
> > Retool. At least there is no (c) info. Posted to pov.bin.util.
> Technically that is a dot matrix display font rather than a LCD font.
I made the text in the picture in Photoshop dot by dot :)
It's not Retool font, which really is LCD.
Background was stolen from Nokia 5110 promo picture.
-----------------------------------------------------------------------
Kari Kivisalo www.kivisalo.net
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Tom Melly wrote:
> A POV bug? - when I look at a reflective surface in real life, there's
> always something being reflected ;)
Do you see this -
http://www.geocities.com/Heartland/Acres/3072/camera3.html?B1=Pick+up+photo
--
Ken Tyler - 1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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From: Sebastian Strand
Subject: SV: SV: It's that watch again... (42kbu) (17k)
Date: 8 Mar 2000 14:53:28
Message: <38c6afb8@news.povray.org>
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> And you would of course share this resource with us, right? You just
> forgot, right? ;-)
Of course :)
Here's where I found it:
http://www.users.glo.be/~gd33771/LCD.html
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Hi!
Chris Huff wrote:
> Also, something I have never seen anyone do in an image of an LCD
> display is the "floating" appearance of most of them. There is usually
> the LCD elements in a plane within the glass, and a bit of "shadow" on
> the back of the glass. If you did this, it would really add to the
> realism of the display.
To model a LCD more correctly, I guess you may take into account
the effect that two polarizing layers (90 deg on each other) some
distance apart, has on the light.
Light falling in from different angles seems to be blocked differently.
On some LCD one can also see a weak shades of digits that are not
turned on if one tilt the LCD slightly.
You may also model the different layers of glass and liquid crystal that
are inside these.
By the way: Is it possible to model polarizing filters in POV-ray?
Tor Olav
mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html
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I got courius about LCD's and did a search for info.
I found a brief explanation of LCD's here:
http://www.sharp.ca/lcd_principles.html
But I don't understand what happens when non-
perpendicular (to the glass) light rays enters the LCD.
Can anybody explain?
Tor Olav Kristensen wrote:
> ...
> To model a LCD more correctly, I guess you may take into account
> the effect that two polarizing layers (90 deg on each other) some
> distance apart, has on the light.
> ...
> You may also model the different layers of glass and liquid crystal that
> are inside these.
mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html
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The polarization is blocking non-perpendicular light. That's part of the
process, to only use light which is aligning with the top layer. Other light is
unwanted or not needed anyway for the action of the LCD. You would also need to
think in terms of waves, not the simple description there at the web page. The
upper polarizing filter is allowing all up and down (or back and forth)
lightwaves to enter while the lower one is allowing side to side waves. When
the voltage is applied you don't see past the second polarizing filter hence
it's darkened. I think that's right anyhow. So any other light is negligible,
only the one direction of waves is used in the case of that TN type LCD display
example there. It's then refracted (not sure that's the word for it) around 90
degrees to pass through the bottom layer when nothing is displayed.
Bob
"Tor Olav Kristensen" <tor### [at] hotmailcom> wrote in message
news:38C6FE39.D0FAC7F1@hotmail.com...
| I got courius about LCD's and did a search for info.
|
| I found a brief explanation of LCD's here:
|
| http://www.sharp.ca/lcd_principles.html
|
| But I don't understand what happens when non-
| perpendicular (to the glass) light rays enters the LCD.
|
| Can anybody explain?
|
| Tor Olav Kristensen wrote:
|
| > ...
| > To model a LCD more correctly, I guess you may take into account
| > the effect that two polarizing layers (90 deg on each other) some
| > distance apart, has on the light.
| > ...
| > You may also model the different layers of glass and liquid crystal that
| > are inside these.
|
| mailto:tor### [at] hotmailcom
| http://www.crosswinds.net/~tok/tokrays.html
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|
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