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"JRG" <jrg### [at] hotmail com> wrote in message
news:3bfe98ed@news.povray.org...
> I'm sorry, but it doesn't make sense to me... :(
> By definition, the lightsources inside a lightgroup should light only the
> objects in the lightgroup. If I want them not to cast shadows I'll put a
> no_shadow flag.
I believe the confusion here might be that the objects won't cast a shadow
onto things outside of the particular light group. Is that what you were
seeing? Or are you saying that you do not see any shadows on objects from
other objects all within a certain light group?
Hmm, I've rendered your test scene and I get a shadow across the text coming
from the torus. I thought you were not seeing shadows on a background plane
or something, so what I'm seeing here is actually expected.
What I would question as to what is expected or not is the following:
#declare Location = <0, 2, -4>;
#declare Look_at = <0, 0, 0>;
camera
{
location Location
look_at Look_at
}
#declare Thing=
text {ttf "arialbd.ttf" "TEXT" 1,0 pigment {rgb 1} translate -x-z/2}
light_group {
light_source
{ <-4, 0, -5>
rgb 1.5
}
object {Thing}
} // end group
torus {1.75,0.25 pigment {rgb 1}} // makes shadow
In this case a person might be thinking they could shine the light through
any objects not contained within a particular light group. Instead, it
still casts a shadow.
Bob H.
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