1)
I use the 2d API exclusively and so have always had to make screensavers for channels.
I'm now modifying the Hero-grid SG example and added a roscreen section at the start so as to pick the video (RSG) or audio (roScreen).
Before I did this, the example would use my chosen system screensaver over RSG. After adding the roScreen, and even when calling it invalid on RSG start, I get the "Big City Stroll" screensaver. I don't want it and i didn't choose it. Bug?2)
Can roScreen screensavers be used in an SG app?
Kinetics Screensavers