I created some billboards for use on Custom Tracks and Texture Hacked Tracks. Here are some advertisements I created months ago by clicking these spoilers below.
Acorn Shroomers National Bank
Piranha Plant Co.
Super Leaf Mart
Mario's Kart Underwater Adventure 3D
Mario Kart Star Halftone
If you want to see the full pack of billboards, visit my Photobucket: Pictures by MachRider14 - Photobucket
or my full gallery on DeviantArt: http://machrider14.deviantart.com/gallery/28492793#