Rendering for Beginners

8

Shading

In this chapter we talk about the look of things in a scene, achieved via small programs called shaders. The shading system in RenderMan is one of its best features. This chapter illustrates the diversity of looks that can be obtained using shaders.

8.1 Introduction

Coloring, lighting, shading and texturing are all terms used in 3D CG for talking about surface appearances. In the physical world, light interacts with a variety of materials in fascinating ways, leading to a rich visual diversity. From the translucency of a leaf against sunlight to the glint of a gold ornament, optical phenomena fills our environment. We handle an assortment of natural and human-made materials in our day-to-day lives, not paying special attention to how ...