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Don Omondi
b6cf45737f
A sampled function (type 0) of two or more inputs took the nearest sample, so a function-based shading over one came in as flat blocks. It is now interpolated multilinearly, and with Order 3 by cubics through the samples, kept in its range (PLRM 3rd ed. section 3.10.1). An axial or radial shading over a linearly interpolated sampled function of one input has a stop at each sample.