Vertical Waves in Oribt Traps

Using the formula cos(r)+log(i*i) for the Orbit Traps, it shows a damping waveform in 3D. You can't see it in 2D, as it is just the color would vary a bit.

Look at the 2D version here: http://fractalspectacle.ning.com/photo/waves-in-orbit-traps?context=user