In article <390367b6@news.povray.org>, "Alf Peake" 
<alf### [at] peake42freeservecouk> wrote:

> I was having another try at smoothly joining 2 different sized pipes 
> or tubes at rightangles when I hit this problem - one tube developed 
> large holes in it. Open or closed cylinders made no difference but 
> they do change with camera angle or RadW. I used DOS versions of mpov 
> 0.4 and pov 3.1g.

Since this isn't a programming question, you should probably have posted 
it to povray.advanced-users.
Anyway, it sounds like a coincident surfaces problem. I haven't had a 
chance to examine the source in detail, but make sure you always have 
some overlap, and avoid having two surfaces occupy the same region of 
space(intersecting surfaces are fine of course, but if a larger area is 
coincident, POV has trouble deciding which one to render or whether to 
remove a surface).

-- 
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/

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