This test was taken from Processing.org which tests to make
sure the specular() works correctly on a sphere.
// Test from Processing.org size(100, 100, P3D); background(0); noStroke(); fill(0, 51, 102); lightSpecular(255, 255, 255); directionalLight(204, 204, 204, 0, 0, -1); translate(20, 50, 0); specular(255, 255, 255); sphere(30); translate(60, 0, 0); specular(204, 102, 0); sphere(30);