This article explains the Perspective Grid Tool in Illustrator and how to use it. There are examples of real-world applications for this tool.

Master curved forms in your architectural sketches with the grid method! This tutorial shows you how to use a perspective ...

Learn the basics of one-point perspective by setting up a perspective grid—perfect for drawing depth and dimension.

Andrea Pozzo (1642-1709), Rules and Examples of Perspective Proper for Painters and Architects, etc. in English and Latin: Continuing a Most Easy and Expeditious Method to Delineate in Perspective all ...

Morpholio's "Perspective Finder" tool makes accurately sketching over photographs in their Trace app simple.