This is a fun step-by-step tutorial showing you how to create a CAD database from a crumpled piece of paper. I rendered my crumpled paper using KeyShot software, though I am skipping those steps in this tutorial.
-an iPad with Autodesk 123D Catch
to scan the image into CAD (free download)
*you may use a digital camera & Autodesk 123D Catch for online or PC instead
to massage & patch up the CAD surfaces (free download)
to render: optional (no free download :(