Is this a go?
It may have been dodgy to try to push this as a bugfix, but I strongly
think it warrants a doc clarification.
"Greg M. Johnson" wrote:
> Add somewhere after the fog equation is written:>> Note that for this equation, a distance of zero is undefined. In> practice, povray will treat this value as "fog is off". To use an> extremely thick fog, use a small nonzero number such as 1e-6 or 1e-10.
