We can see that in both studies there are some dark and dense tonal values which create form shadows on the drapery and the objects placed on the table. This gives the picture a 3-D effect of volume, mass and depth.
The first study shows a subtle difference between light and shadow. You can see where the form shadow is as the source of light is coming in from the right. This creates a more dark tonal value to the objects on the left especially on the arc of the cone as well as the sphere. You can see a slightly dark reflection on the center of the sphere and cone as the dark drapery gives off the reflected light. Also, the sphere has cast a shadow on the top part of the cone as you can see it has a much more darker tonal value compared to the lower part of the cone where the point is.







