Comments
Generated the checkerboard using a script. Played around with the materials to make the spheres look like glass. Traced with depth 3 to avoid making the spheres too noisy. Used AAx4.
Raytraced Scene

Generated the checkerboard using a script. Played around with the materials to make the spheres look like glass. Traced with depth 3 to avoid making the spheres too noisy. Used AAx4.