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Our approach uses imagery from atomic force microscopy that accurately captures the geometry of the nanostructures responsible for structural colouration, that is, colouration due to wave interference, in a variety of animals. We develop a rendering technique that constructs bidirectional reflection distribution functions (BRDFs) directly from the measured data and leverages pre\u2010computation to achieve interactive performance. We demonstrate results of our approach using various shapes of the surface grating nanostructures. 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