HK: Do you ever feel held back by commercial work?
CT: With commercial work I try to push set themes as hard as I can. When Tiger Beer told me about the concept of turning pollution into ink for the “Tiger Beer Air-Ink” campaign, it appealed to me because it’s so relevant to Asia. It’s really cool that someone had the idea to take dirt out of the air and make it into something we can use, turning it into a message: Global warming is real, and the ink reflects the amount of dirt in the air. Making a wall pretty isn’t my sole responsibility—it’s also my chance to put a message on a wall for everyone to see in their own time.