"Eriban" <pov### [at] spamgourmetcom> wrote in message 
news:web.4a411f4899a5bfb681475b100@news.povray.org...
>
> I just thought I'd share my first results of using your rope macro. 
> Attached is
> an image with the result. To create the hanging loops I created a small 
> macro
> of my own. I still need to clean it up a bit and make it a bit more 
> general,
> but then I'll share it.
>
> I still have a problem with showing the fibers. When I turn this on, 
> rendering
> slows down to a crawl, and the results look pretty bad. Basically, the 
> rope
> becomes all black. I could be that I am doing something wrong, or that the
> version of MegaPov I am using is not compatible with your macros. I still 
> need
> to investigate what's wrong. However, there's no rush, cause in my scene 
> there's
> no need to show the fibers anyway.
>

Hi Erwin,

No it's nothing you've done wrong.

As soon as you said that I remembered that I was surprised that I hadn't 
needed to increase the POV-Ray max_trace_level when I developed the outer 
'fibre' layer, because it uses a sort of semi-transparent skin around the 
outside of the rope made out of strings of spheres. This semi-transparent 
layer is why it takes about 10 times as long to render. I developed this 
under 3.7 beta 32 and I had intended to test it on POV-Ray 3.6 before 
posting it, but I forgot.

Now that I tried it on 3.6 it clearly needs the following line adding if 
fibres are used and I would imagine it's the same problem for MegaPOV:
global_settings {max_trace_level 10}

I'm still not really sure why it doesn't need this on the 3.7 beta 32.
I also notice that the lighting levels are a lot darker on 3.6, but I guess 
you've already spotted that and set Rope_Brightness to 2 to compensate, 
because your scene looks bright enough (or maybe MegaPOV is different from 
3.6 on lighting levels).

Best Regards,
Chris B.

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