Bob Hughes <per### [at] aolcom?subject=PoV-News:> wrote in message
news:39514220@news.povray.org...
> Posting this for the reason of showing a CSG-gone-wrong situation.
> In the zoomed view of the dragonfly you will be able to see how a
separate
> cylinder doesn't mix with the rest of the object at all, it actually
removes
> (or more precisely, makes invisible) the parts behind it.

The only time I had a similar problem it was solved by raising
max_intersections.
Check your stats for I_stack overflow.


--
Alf

http://www.peake42.freeserve.co.uk/
http://ourworld.compuserve.com/homepages/Alf_Peake/

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"Alf Peake" <alf### [at] peake42freeservecouk> wrote in message
news:3954cfab@news.povray.org...
|
| Bob Hughes <per### [at] aolcom?subject=PoV-News:> wrote in message
| news:39514220@news.povray.org...
| > Posting this for the reason of showing a CSG-gone-wrong situation.
| > In the zoomed view of the dragonfly you will be able to see how a
| separate
| > cylinder doesn't mix with the rest of the object at all, it actually
| removes
| > (or more precisely, makes invisible) the parts behind it.
|
| The only time I had a similar problem it was solved by raising
| max_intersections.
| Check your stats for I_stack overflow.

I wasn't getting a I_stack overflow, tried raising max_intersections per your
suggestion anyway.
Thing is, I know what the problem is, or at least related to anyhow.  It's the
very small scales I had been using.  I've known that 'sphere' will begin to
deteriorate in strange ways at a scale of about >0.02 unit from what I had
learned, which is nearly the starting diameters of the blob components.  Then
I further scaled down to 0.0025.  What fooled me was that it rendered properly
outside of the CSG so I thought I was safe.  Fact is, in using what I'd call
imprecise decimal numbers you always risk a degradation, especially of
'sphere' objects and quite obviously other primitives too ('cone' seems very
sturdy however).  Keep in mind this is CPU and OS dependant stuff from what I
understand.
So, with the blob components being at around 0.02 or greater in diameter the
problem vanishes, if you'll pardon the pun.
Thanks for trying, you and the others.  It was pretty stupid of me to struggle
over this with what I already understood.

Bob

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