I had the same problem . I used the "Polygon to Line" tool to create a new line feature. Added the new line feature to ArcScene and it worked, the outlines of the former polygons floated on the TIN with no distortions.
Signed in members can post, follow updates, and more. New here? Register a free account.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.