A quick tutorial on how to use the Knife Project to mesh on or through an object in the shape of another. Other objects here ...

Vector file formats include AI, EPS, SVG and sometimes PDF files, with SVG (Scalable Vector Graphics) being the most common.

A vector file is an image that can be made infinitely large without losing quality, and usually comes as an .AI, .EPS, .PDF, or .SVG file.