10. Repeat steps 8 and 9 to create another standard material called Sphere-Material beneath the previous standard material and choose a solid red color for its diffuse channel.
11. Right click somewhere one the right side of standard materials and choose Standard – Multi/Sub-Object from Materials.
12. Double click on the Multi/Sub-Object material to open the Basic Parameters. As you can see there are 10 sub materials, we only need 2 for our geometry (one for sphere, one for cube), so go to Set Number, press, and set the number of materials to 2.