In the photograph titled "South Rim Tree" (Grand Canyon 2000), the foreground holds a beautiful old mesquite tree, the canyon gaping behind it, with rising white clouds billowing in a sapphire sky. The tree, a tenuous clutch of bark and leaves, provides perspective and depth. Instead of being flattened out by its massive scale, the canyon appears almost three-dimensional.

A similar dimensionality is achieved by opposite means with "Interior" (Grand Canyon 2000) By cropping the canyon, having it fill the entire frame of the picture without the sky above, Marty gets perspective, and also captures the particular shadows and distilled light that hit the canyon floor.