Answer :
for a sculpture to be considered high relief, the forms must project out from the background for at least 50 percent of their visual depth.
Any piece that extends from but is a part of the wall, or other background surface, on which it is carved, is referred to as a relief sculpture in the field of plastic art. Reliefs are typically categorized based on how far the figures stand out from the background. Relievo is another name for relief sculpture, which combines two- and three-dimensional sculptural techniques. As a result, a relief, like a picture, depends on a background surface and needs to have an extended composition in a plane to be seen. Yet at the same time a relief also possesses a degree of actual three-dimensionality, exactly like a proper sculpture.
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