A method is performed at an electronic device with a controller and a display. The method includes identifying, within a first memory, a first object that satisfies a locked criterion. For example, the first object corresponds to a head-locked object or a body-locked object. The first object is associated with a first plurality of pixel values. The method includes blitting, via the controller, the first plurality of pixel values from the first memory to a second memory. The method includes displaying, on the display, the first object by obtaining the first plurality of pixel values from the second memory. In some implementations, the method includes rendering, via a graphics processing unit (GPU), a second object that does not satisfy the locked criterion, such as a world-locked object. As compared with GPU rendering, blitting is less computationally expensive.