Hey there, we use BoxShot Origami to generate corrugated box dielines in Illustrator, and export them as 3D models for use in Keyshot. Our standard practice is to export as a Collada (DAE) file; to assist our team of designers who do this often, I've put together an instructable of some post-processing tips to give the boxes more realism:
https://www.instructables.com/Origami-to-Keyshot-Corrugated-Boxes/ (https://www.instructables.com/Origami-to-Keyshot-Corrugated-Boxes/)