

It gives you the ability to tweak the model in a way to see it on a different angle.

You are able to disable and enable layers. You can rotate, spin and more, and even measure object's length and add comments. The 3D PDF file give you the following abilities (at least the ones I created using ProgeCAD) (Make sure you download the file into your computer before using, to download: right click and save link as…) Here are few DWG files I converted into 3D PDFs

We are no more having a static 2D representation in the PDF, but an interactive 3D model inside a pdf file. Using this type of file gives you the ability to visualize a 3D model in a PDF file just a little like you were from a CAD software. The 3D PDF are types of files created with the aim to keep most important 3D characteristics of your design into a PDF from any CAD file. If you do not know what a 3D PDF (U3D: universal 3D) is, here is a quick definition and some example of what to expect from 3D PDFs.
