I did these renderings for art directors and ad agencies here in Orange County where I began free-lancing in 1983. I used to work with airbrush (the oxygenator at the top left is an example), but in 1994 I switched to digital, which is how I painted most of these samples. I work in Photoshop. The Steamroller illustration (bottom right) was my first attempt using a 3D program for rendering.