Abstract: One embodiment of a virtual reality apparatus comprises: a graphics processing engine comprising a plurality of graphics processing stages, the graphics processing engine to render a plurality of image frames for left and right displays of a head mounted display (HMD); and foveation control hardware logic to independently control two or more of the plurality of graphics processing stages based on feedback received from an eye tracking module of the HMD, the feedback indicating a foveated region selected based on a current or anticipated direction of a user's gaze, the foveation control hardware logic to cause the two or more of the graphics processing stages to process the foveated region differently than other regions of the image frames.

Abstract: In accordance with some embodiments, the render rate is varied across and/or up and down the display screen. This may be done based on where the user is looking in order to reduce power consumption and/or increase performance. Specifically the screen display is separated into regions, such as quadrants. Each of these regions is rendered at a rate determined by at least one of what the user is currently looking at, what the user has looked at in the past and/or what it is predicted that the user will look at next. Areas of less focus may be rendered at a lower rate, reducing power consumption in some embodiments.

Abstract: The drill brush and vacuum attachment apparatus provides for attachment to a vacuum cleaner and to a drill. The diameter reduction of the shaft first end is removably chucked into a drill of choice. The drill thereby turns the shaft as the free-wheel sleeve is free to be held stationary by a user via the angled reaction bar. The bar with associated collar may adjustably positioned along the sleeve, then tightened in the desired position by the thumb screw. Various shapes and sizes of removable brushes and other tools may be threadably attached to the shaft second end and used to clean various work pieces, and especially to clean out pre-drilled holes. As a work piece is cleaned by brushes and tools, the vacuum connected to the free-wheel sleeve vacuum tube draws debris and potentially airborne materials in, thereby negating potential mess, material clouds, and ensures a healthy work place.