When the gray matter surfaces of the brain’s hemispheres are made transparent, the observer gains an insight into subjacent white matter fiber tracts which can be calculated by a technique called fiber tractography. Here, only the fibers passing through the corpus callosum, which is the major fiber bundle connecting the two hemispheres, are visualized. The surfaces of the two hemispheres are smoothed and inflated. Color-encoding of the fiber tracts marks their directions (red: left-right, green: anterior-posterior, blue: superior-inferior). View from the right side