Item Types are lost in 3D

Hi all,

We have 2D files, on all elements Item Types are attached. 

When we use Stencil 2D elements on 3D Geomtery, all Item Types are lost! We want ot keep the Item Type data on the draped 3D elements. Is there a way to extract the Item Type data en attach the data later to the 3D elements? 

Best regards

Mark