Hi @dalelear I just noticed that when I exported the model to TwinMotion (in game engines faces are by default only drawn on one side (but twosided materials are an option)) parts of one object was invisible, so I checked in Rhino and I see that this is the case with the subD object too: [image] …

SubD ununified directions on one object

brian (Brian Gillespie) August 11, 2020, 11:49pm 11

RH-59683 is fixed in the latest WIP

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