Subject:
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Re: Can anyone help by suggesting some lighting tips?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Tue, 1 Jul 2003 10:39:46 GMT
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Viewed:
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4600 times
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"Allan Bedford" <ExpertBuilder-DELETE-TO-REPLY@apotome.com> skrev i
meddelandet news:HHBnzC.uH@lugnet.com...
> In lugnet.cad.ray, Anders Isaksson wrote:
>
> > One way is to add a 'light.dat' to your model at a position you want the
> > light to come from. Not to close though...
>
> Is this different than some of the .inc files that others have already • suggested
> using? And if so, can you point me to some further info or an example?
Sorry, I have never used it, just read about it. It is supposed to place a
light at exactly at the spot where you put that piece (and L3P turns off the
'default' lights?)
> I notice that although I feed LPub one set of camera parameters, those • don't
> seem to be what ends up getting used by POV-Ray. I have been using 5, 30 • as my
> latitude and longitude. But these values seem to be translated by the • time they
> get to POV-Ray. Which makes it hard to figure out where to add my lights. • Is
> that making sense? Or am I the only one struggling with this?
The coordinate system in the .pov file is not that difficult - X goes from
left to right, Y from top to bottom (negative upwards), Z into the screen.
> > I also almost always move the camera away tenfold (or more) from the • model,
> > and change the 'angle' parameter to still have a reasonable size of the
> > model. This gives a more realistic perspective (IMO).
>
> I was wondering about that too. The perspective that is getting generated
> (LPub>L3P>POV) seems quite exagerated. When you say the 'angle' • parameter, do
> you mean the camera angle/direction?
The 'angle' parameter of the camera is not about direction, it's in
principle the kind of objective you put on the camera. A telephoto lens has
a small angle, a normal lens a larger and a 'Fisheye' a very large.
camera {
location <-920,-1098,-2169>
sky -y
right -4/3*x
look_at <40, -168, -250>
angle 25
}
--
Anders Isaksson, Sweden
BlockCAD: http://user.tninet.se/~hbh828t/proglego.htm
Gallery: http://user.tninet.se/~hbh828t/gallery/index.htm
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Message is in Reply To:
 | | Re: Can anyone help by suggesting some lighting tips?
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| (...) I'm quite happy/comfortable editing the .pov file directly... it's just the values and directions I'm still trying to get a grip on. (...) Is this different than some of the .inc files that others have already suggested using? And if so, can (...) (23 years ago, 1-Jul-03, to lugnet.cad.ray)
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