Op 11-4-2021 om 14:48 schreef Mr:
> Thanks for asking feedback and sorry to be that pronounced, it's easier to
> comment than to do.
> 

You are very welcome indeed to comment in any way :-)

My initial - and still main - purpose is to provide an /ancient/ code in 
more /modern/ context. I think that granites.inc (1996) merits to be 
considered. I am sure that your objections are valid. However, the code 
needs to be given as it was written 25 years ago (with some minor 
changes by me, I confess) and not as one written today, with all the 
knowledge accumulated since then. This is a piece of POV-Ray archeology 
as it were...

-- 
Thomas

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