Why must I generate the CAD model of a special item in the CAD portal?

Only a pre-generated standard CAD model of the item variants is available in the CAD portal.

The special dimensions of a selected item (item table, variable view) is only integrated into the standard model after regenerating the CAD model (Step 2 in the CAD portal). Only then do the presentations of the “Preview of the CAD model” match the special, selected item.