> Is that "stripe" supposed to be missing?
> (I like the effect anyway  :) )
....
     310, // minor_r_ends ; the arc formed by smaller radius
complete "n-degrees"

     360*5, // degrees of torsion around the minor radius

.....
The minor arc does not close completely, and then the final segment is 
rotated five times. Play with it little by little.

> This took about 13 min to parse on my tower at work, and not very long to render
> for me - what are those huge times you're posting?

Radiosity and focal blur were deactivated in the code I sent.
> 
> The torus that I'm working on doesn't take nearly that much time to parse on my
> laptop.
Maybe I'm subdividing a lot of nested loops of bicubic_patchs?
> 
> I'll send you an email and maybe we can compare notes.
> 
> 
B. Gimeno

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