Editing Volume rendering (section)

===Multiple and adaptive resolution representation===
By representing less interesting regions of the volume in a coarser resolution, the data input overhead can be reduced.  On closer observation, the data in these regions can be populated either by reading from memory or disk, or by [[interpolation]]. The coarser resolution volume is resampled to a smaller size in the same way as a 2D mipmap image is created from the original. These smaller volume are also used by themselves while rotating the volume to a new orientation.