The first three images followed the methodology that I used to draw during class.The last one is following two point perspective.I hope this is going to be helpful for you.
Pandora
Please also use these links about the Avatar creatures: http://james-camerons-avatar.wikia.com/wiki/Gallery:_Pandoran_Creatures http://io9.com/#!5420143/5-designers-reveal-secrets-of-james-camerons-avatar http://www.nevillepage.com/portfolio-2/creatures/ Another good practice is to develop concepts for movies. Let’s take Avatar as an example.Develop 10 pages in 11x 14 size paper of concept development for the creatures
Designing Gravity coffee makers
the highlighted part is a clear example of the next assignment.You have to draw a perspective and exploded view in a side view .Please, let me know if this help.