RenderMan Interface Specification (RIS)

The RenderMan Interface Specification (RIS) is a set of guidelines created by Pixar for rendering 3D graphics. It defines how to create realistic images by specifying how light interacts with materials, shapes, and environments. RIS allows artists and developers to work with complex scenes while ensuring consistent and high-quality visual output across different software. Essentially, it standardizes the way rendering is done in computer graphics, making it easier to efficiently produce stunning visuals in movies, video games, and other digital media.