Extremely helpful and informative.
And not just for Flash, either. Anyone who struggles with perspective can get a better idea on it thanks to this helpful (if not a tad overwhelming for beginners) tutorial. Although I myself am an artist and am already aware of those two basic perspective techniques, it was still interesting to read, because I was able to analyze how well the author is able to put things in words to help others. The visuals were very simple and effective, and like mentioned in the description, those that may not find the tutorial hepful will at least find the gas station render interesting.