© Disney/ Pixar
In partnership with Pixar's Studio, we are delivering a way for the renderer to automatically switch Bump Roughness was created for efficiently sampling micro details in Cars 3. With this pattern, RenderMan automatically switches from a bump map to a roughness value depending on the size of a feature in the camera. This, in turn, will also improve your render times due to the lower , effectively improving your render times by lowering the sampling rates needed to render such details.
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.
A crucial feature of Bump Roughness map helps is to keep those micro details in the wide and medium shots when objects are far from the camera, as shown in this closeup the example below.
This is not only is this an improvement in technology, but this technique allows you to enhance your storytelling with wear and aging.
Photorealism is all in the details !
above.
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.
© Disney/ Pixar
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