[1]-Choose the Sphere and create sphere with the following size
Now place like me
[2]-Convert the sphere into the editable poly make the selections like me
[3]-With the selected polygons now open the material window and assign the materials like me
[4]-Select the edges and apply the extrude edges with the good following amount as shown below
[5]-After that your object should like this
[6]-Create cylinder with the following size and place like me
[7]-Convert the cylinder into the editable now make the selection
Apply the extrude polygons with the amount of -0.3
[8]-Your object should like this
[9]-Make the green material and assign like me
[10]-Set the skylight like this with the good following parameters
[13]-Now you are done it enjoy the final output as shown below
Source : tutorialized.com