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Originally posted by Colours:
How would I go about making a realistic polished metal Shader.
Without ray-tracing it's hard to make a really realistic metal texture for large objects, as the lack of reflections tends to create a plastic-y look. But mechanisto can certainly do for smaller objects like pipes and such: mess around with the 'specular' and 'shininess' variables on your 'finish' component, and also try out some random images as environment maps (making the level something low like .4). Also consider adding a turbulence and a noise component, giving the noise a high scale (around 30) and making the two colors only slightly different; also you could add a halo, unchecking 'edge fade-out' and making the halo color a slightly darker version of the colors you used in the noise component.
Using those techniques I came up with this test image... I don't know if it's quite what you're looking for, but it may be a start: