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I have some questions about light groups.
In this scene I have a white sphere iluminated by red light, both forming a
light group. I also have a white light iluminating the global scene. The
plane is correctly unnaffected by the red light: the sphere casts no shadow
resulting from this red light. Now here is what seems odd to me. If the
white light is, in this case, the global light, and I have the command
global_lights set to off, how come the white light still interacts with the
sphere, causing it to cast a shadow on the plane? Is this really the
intended behaviour? If so, is there a reason for it being so?
Ruy
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Here is the code:
#declare RedLight = light_source {
<-5,5,-5>
rgb <1,0,0>
}
camera{
location <0, 5, -10>
look_at 0
}
light_source { y*100 rgb 1 }
light_group {
light_source {RedLight}
sphere {0,1 pigment {rgb 1}}
global_lights on
}
plane { y, -2 pigment { rgb 1 } }
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![light group test.jpg](/povray.binaries.images/attachment/%3C3bee69bf%40news.povray.org%3E/light%20group%20test.jpg?preview=1)
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