Explanation of rendering one of the sketches from the book BLAST.
Download the layered PSD file here: https://dl.dropboxusercontent.com/u/12145948/SR_BLAST_sketch.psd
Check out the book here:
http://www.amazon.com/BLAST-spaceship-renderings-Scott-Robertson/dp/1933492546/ref=sr_1_1?ie=UTF8&qid=1375462822&sr=8-1&keywords=blast+scott+robertson