Step #1
First commence the tutorial by making a rectangle.
Step #2
Draw outline for rectangle & a circle.
Step #3
Draw upper edges of tank.
Step #4
Make lower edges of tank.
Step #5
Enhance lower edges of tank.
Step #6
Draw tyres.
Step #7
Draw middle body of tanks.
Step #8
Make side body of tanker.
Step #9
Make window and enhance side body of tanker.
Step #10
Draw tanker spout and enhance upper body.
Step #11
Finally, make necessary improvements to finish.
