The Aliens are trying to attack the city but the human is too tough. Finally, they decide to use Goliath, their huge and strongest robot. The army can't defense against Goliath, but David, a strong and brave man dares to do that.
I used the provided source for constructing the aircraft where David is standing on and making the screen on the side of the collapsed building.
Goliath was made mostly by drawing.
Stock credits to:
Marcus Ranum, roar-shack-stock, fantasystock, bipolargenius, jdipstock (DA), istargazer, addictive_picasso, donsolo, photofarmer, falh (flickr).
One more source link is the fire: http://jdipstock.deviantart.com/gallery/#/dx4xuh
For the tutorial of making the smoke, you can refer to this link: http://www.digitalartsonline.co.uk/tutorials/index.cfm?FeatureID=1740&pn=1. (5 years and 2782 days ago)