Heres, what I do in Rhino. Make your horn segment and then array along a line . Then Taper the result. Bend the whole mess a smidge in one direction and then use the bend command to twist it in a perpindicular direction. You might have to explode the objects since the bend and taper commands don't work on polysurfaces. Just join the surfaces rigt back together after you get through making your adjustments. I hope this made sense.

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"The true sign of intelligence is not knowledge but imagination".

Albert Einstein