How much of the view a body fills, roughly — its own world-space radius
divided by the camera's current distance to it. Not a precise angular
measurement (that would need the FOV too), just a cheap, monotonic proxy:
bigger apparent size always means more screen-space detail is visible and
worth rendering.
How much of the view a body fills, roughly — its own world-space radius divided by the camera's current distance to it. Not a precise angular measurement (that would need the FOV too), just a cheap, monotonic proxy: bigger apparent size always means more screen-space detail is visible and worth rendering.