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