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This one took me a few months to finish. I took my time on this one. I used spray paint and stencils to make this on drywall above a living room door. The Millennium Falcon was drawn using Sharpy markers. To give the blur effect for the background I used my fingers to smear the spray paint. 

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This one is one of my favorites. It only took me about four hours to do. I used spray paint and stencils. It was done in layers. I started with the background black, then white, yellow, orange, and red. Then I used my hand to smear the paint outwards giving it an alien sunset.  I drew the hills, ship, astronauts all on cardboard and cut out stencils, and just used black paint to give a silhouette of the alien world.