On the Gear VR, when I enter in the HMD sp command (either on start or while the app is running), instead of scaling up the rendering of the image per eye, instead it seems to do a zoom on the scene instead, as seen below.
Tested on 10.4, the HMD SP command does not seem to have any effect at all for me on Gear VR.
Is there a different way to improve the quality on GearVR? My scene is very simple, being able to super sample it a little would help greatly.