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One such example is Louise Nash (shaded by Yeon Kang) from Cars 3. Here you can see extensive wear of the clear coat on the paint job, which creates micro-scratches and breaks up the specular in interesting ways, also driving the anisotropy in ways which more accurately reflect the intended look-development.
© Disney/ Pixar
A crucial feature
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of Bump Roughness
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is to see micro details when objects are far from the camera. In the example above, you can see how we can get very close to the intended look-development with only 1 sample, instead of having to fire hundreds of rays to visualize the intended level of detail in the textures.
In the example above we can see how we can drive roughness, anisotropy, and bump with a single texture. When zooming 4X we can appreciate how Bump Roughness maintains detail where bump generally gets lost due to filtering.
There are many other types of materials that benefit from the added detail that Bump Roughness maps bring, such as carbon fibre, metals, plastics, and fabrics.
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