Lightning McQueen faces a new generation of faster racers and suffers a devastating crash. Fearing his career is over, he trains with Cruz Ramirez, a spirited but uncertain coach. As they work together, Lightning realizes Cruz has the talent he once had. In the final race, he lets her take his place, and she wins. Embracing a new role as mentor, Lightning learns that moving forward sometimes means lifting others up.
It was used to emphasize the aging details on hero characters, like the older racer Louise Nash. This effect shows the wear of the clear coat and creates micro-scratches on the paint job giving more realism to materials. it helps convey a sense of history and use, suggesting that each character has accumulated years of experiences reflected in the imperfections of their finish.
Bump Roughness was created for efficiently sampling micro details. With this pattern, RenderMan automatically switches from a bump map to a roughness value depending on the size of a feature in the camera, effectively improving your render times by lowering the sampling rates needed to render such details.
