In article <web.44b0c2812a037f6269bcdf780@news.povray.org>, 
nomail@nomail says...
> Patrick Elliott <sel### [at] rraznet> wrote:
> > In article <44a85af5$1@news.povray.org>, zeg### [at] povplacecom
> > says...
> > > "Patrick Elliott" <sel### [at] rraznet> wrote in message news:MPG.1f1092
509c
> > 9cfad9989f32@news.povray.org...
> > > > Yeah, I know you can use Radiosity. I was thinking in terms of what
> > > > might work "without" that.
> > >
> > > how would you do what you describe without using a very similar techn
ique
> >  POV-Ray's radiosity uses?
> > >
> > No idea. Its not like I can code the idea. lol
> >
> > Frankly, I kind of wanted either a) that won't work at all, or b) it is
> > an interesting idea. A long laundry list about why I could solve the
> > same problems with a mess of other features was "not" what I was after.
> > As I said, I rethought it several times. Its possible that it isn't
> > possible and a totally pointless idea, if I knew enough to realize it.
> > Telling me I can "sort of" get the same result I envisioned with other
> > stuff or a bit like saying, "You can sort of make a flying car of you
> > strap wings and a jet engine on a VW Bug.", without bothering to say wh
y
> > using a VW Bug is a better alternative that just building a flying car.
> > One good reason might be, "It won't work anyway.", but that's not what 
I
> > ended up with. ;)
> >
> > --
> > void main () {

> >     call functional_code()
> >   else
> >     call crash_windows();
> > }
> 
> The responses you got are what they are because that's simply what's
> possible, and what's effective. You can't put a light-source in the
> sky_sphere because it isn't an object, but an abstraction. Like backgroun
d,
> it's not really there, but is something added if the ray doesn't hit an
> object. Light sources need _some_ positional parameter, and a sky_sphere,
> despite accepting the same pigment_map function that other objects do,
> doesn't provide that.
> 
> You were told that the best way to get the low-key lighting from the sky 
was
> to use radiosity, but you rejected that. It's resource-intensive, fair
> enough. Would have been good if you had said that, instead of just no, I
> don't want it. You're asking people to give you advice for free, if you'r
e
> going to reject it openly, at least tell us why.
> 
> Then it was suggested that you use a low-intensity shadowless light sourc
e
> instead, but you rejected that idea too, saying you were looking for
> something else, when what you said was just what was suggested. That low
> intensity beyond the cut-off that you were asking for, that's what a
> shadowless light source is. If you're still dead-set on using sky_sphere 
to
> simulate the appearance of the sun, give it an x-gradient with yellow (or
> white if you prefer) from say 0.9 to 1.0, make the rest of it blue, then
> rotate it -45*x. Play with the starting point of the white til you get th
e
> size you want. I'm assuming you're looking in the z direction, btw. If no
t,
> adjust the rotation accordingly.
> 
> Please know what you're asking for. You asked for a flying car, and you w
ere
> told *both* the VW bug and build it answer, but you ignored them both.
> 
> Andrea
> 
Actually. I wasn't *asking* for anything. I had an idea. I described it. 
I wanted some input on if it was feasible. If I was asking, "how do you 
do this?", I would have posted it in Advanced users and given some SDL 
showing what I was attempting and why I needed it. I don't **need** 
this. I just thought it might be interesting for someone to try, which 
included the possibility of extending what sky_sphere was actually 
capable of. I am sorry if you thought otherwise and that created some 
confusion as to what I was actually looking for, which was feed back, 
not instructions on how to duplicate the effect.

-- 
void main () {

    call functional_code()
  else
    call crash_windows();
}

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