Deformation when using flow along surface

[pascal (Pascal Golay)]

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Flowing on curved surface [How to keep proportions]

The problem is one of parametrization of your surface - it’s a difficult concept to understand. NURBS surfaces are not necessary linear in their parametrization. What that means is if you traveled along the surface from end to end, instead of going at a constant speed everywhere, you will go faster in some places and slower in others. The places where you go faster, the objects being flowed will be ‘stretched’, and where you go slower, they will be ‘compressed’ There are two ways to approach…

-Pascal