Perturbs the shading normal from a height texture without moving any geometry. Almost free, and its limits are visible the moment a silhouette or a self-shadow is involved.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
Colour is the family; a dashed line is the second member of it.
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This node
approximatesis a cheaper stand-in for Displacement Mappingperturbs normals only; silhouettes stay flat
Referenced by
specializesNormal Mapping is a specific case of thisstores the normal itself rather than a height
References
Simulation of Wrinkled Surfaces — Blinn — 1978 · link