Rhebuck is one of the antelope that are most frequently depicted, after the eland. The rhebuck is comparable to the eland because it is often painted in shaded polychrome. Both eland and rhebuck are depicted in two colours, mainly red and white, even though they are more grey than red. Depictions of men with rhebuck heads are shamans. It is known that shamans with rhebuck heads controlled eland and harnessed their power to enter trance and to perform their various tasks, including rain-making.
Pearce, David
Bushman beliefs suggest that bags had a special significance beyond everyday use. Their relation to trance metaphors is illustrated in San mythology, where parallels were drawn between getting into a skin bag and getting into an animal- that is, taking on its potency. Therefore, bags painted next to a dance or by themselves, are probably an indication of a trance experience.
Blundell, Geoffrey