For independent filmmakers, getting a chance to direct a big Hollywood movie can be a mixed blessing. Sure, you'll make more money, get more resources, and work with higher-profile actors. But you're also likely to wind up with less control and more red tape. Such was the experience of three directors at the "Power of Story: Indies Go Hollywood"-a Sundance Film Festival panel presented by Dropbox. Here's how Justin Lin, Catherine Hardwicke, and Taika Waititi adjusted to their new roles-plus their tips for dealing with the challenges that come with success.