A traditional method of assessing the curvature of complex surfaces such as car bodies has been to place them within a brightly lit cylinder (or half-cylinder) which has longitudinal stripes (bands) or strip-lights. This shader provides the ability to perform this test in software easily. The colour shader is simply attached to the geometry in question (using sensible values for the centre, axis and radius) before rendering, and reflections of the imaginary cylinder will be visible on the surface.
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