The first image uses no shadows.
Its a great photo on it's own, BUT...
The second image used shadows.... note that the light source sits in the lamp. A big oops.
I took off the 'light' here to show what should be ( shadows with more emphisis than intended to bring focus to them )
If you ever decide to introduce self illuminating objects, you'll probably want to deal with this issue.
Oh, I know how tough it would be to introduce shadows in the raytracer as it was in scanline. So don't blame ya if you never get it done