We've featured a lot of LA-based artist El Mac's work through the years and one of the most common questions we get in the comments is "how does he do it"? Here's a time-lapse from last year's Art Basel which should give some insight into the process. From the artist's blog:
Here's a new timelapse video of a piece I painted for the Public Provocations show at the Carhartt Gallery held during the last Art Basel in Switzerland. This was painted with just spraypaint and fatcaps, no stencils or projectors, etc. As I explained in this earlier post, this was based on a photograph I took of a cockroach on the floor of the Margulies Collection when we painted their building during the last Miami Art Basel. It felt appropriate to then paint this during the Swiss Art Basel, alongside all the glamour and wealth. (Someone told me they don't have roaches in Switzerland)