Surface tangent dPdv
The Surface Tangent dPdv node converts the surface tangent along the V axis (in world space) into an RGB texture (figure 2). It is typically used for anisotropy, directional shading, procedural orientation, and OSL calculations.
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Surface Tangent dPdv
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Figure 1: Surface Tangent dPdv Node
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Surface Tangent dPdv
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Figure 2: A Sample Tangent dPdv node example