Warp <war### [at] tagpovrayorg> wrote:
> Kenneth <kdw### [at] earthlinknet> wrote:

> > ...I've always assumed that only a
> > single ray is shot, from *somewhere*, during any CSG operation, which tells
> > POV-Ray what it needs to know. Do I surmise that MANY rays have to be shot?
>
>   Every time POV-Ray needs to know if a point is inside the mesh it will
> trace a ray from that point to the direction specified with inside_vector.
>

Oh! That's a major shift from my previous thinking. Thanks!

Now I see why inside_vector could have an effect on rendering time.

KW

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