Philippe Mazan knows the answer:
After, you can scale and translate your object.
The density is calculated from the radius 1 or less (by scale < 1
on halo). Radius > 1 gives incorrect values for other parameters
and gives strange results.
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Modelling
Tips, Working With Primitives
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| POV-Ray Tips,
Tricks, and Techniques |
Large Halos
Disappear?
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| Brandon Berg has difficulty with halos: | I'm having problems doing spherical halos larger than
a unit or two. If I set the transmit for the colors to anything less
than 1, then they appear completely solid, and if I set them to 1, they
disappear. Smaller than that, they're okay...I could probably just
do it at 1 unit, and then scale it up, but it seems that there should be
a better way. Any ideas what might be happening?
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Philippe Mazan knows the answer:
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Yes, that's right. POV-Ray gives to a halo a radius from
0 to 1. (POV-Ray doc, chapter 7.6.4.1). POV-Ray doc chapter 7.6.4.4
says : Halo container objects ought to be unit sized objects centered at
the origin.
After, you can scale and translate your object. The density is calculated from the radius 1 or less (by scale < 1
on halo). Radius > 1 gives incorrect values for other parameters
and gives strange results.
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