On 7-12-2014 18:28, Le_Forgeron wrote:
> For a solution based on toroidal (original post), the solution is with
> dist_exp 200 (or any big enough value) to neglect the effect of depth,
> or changing the cylindrical to a pigment that has no influence due to
> depth , value 1 at 0, value 0 at -1 and 1: it's planar !!!
 >
[snip]
 >
 > Strictly speaking, dist_exp is cheating. Planar is not.
 >

Interesting. I wondered how to use dist_exp as the docs are not very 
clear on that issue and I did not know what it really represented.

Thanks indeed

Thomas

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