Another street artist in Thailand

This artist, in the night bazaar at Chiang Mai,  had a display of large graphite drawings that were quite detailed...this is the one he was working on when we stumbled upon him:

He's using some sort of magnifier to look at his reference as he draws. I would bet that there is a grid over the photo and possibly had been one on the drawing, as it seems to be a virtual copy of the photo...

 He was also dipping his pencil point in a solvent, probably alcohol, to get the rich fluid darks in his drawing. The next night we happened by and this drawing was in plastic, on the right, with his other finished works. Many of the vendors at this marker did not have prices shown, so I have no idea what he was asking.

He had a crowd watching. I know that feeling!