I've been reading some posts online recommending that for "on land" shooting, the Hero 7 sharpness be set to "low" for more natural looking footage. I haven't gotten to use mine in the water yet but I'm wondering if settings of "medium" or "high" might yield better results underwater where the overall environment is less sharp than on land due to less that gin-clear visibility. Any recommendations for WB of "auto" or "native" (or some other choice) would be helpful, too. I'd be free diving with the camera a depths of 30ft of less. Thanks!