Intersection points over surface from which perpendicular lines start

Hi @karimammor,

Welcome to the forums!

Simply use Surface Closest Point (SrfCP) to find a UV Point (uvP) for each of your points. Then evaluate your surface with Evaluate Surface (EvalSrf) at each UV Point, in order to find its corresponding normal. Lastly, draw a Line SDL (Line) from each point in the direction of the its designated normal and a desired length.

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