OpenGL Insights

Layered Textures R endering

Pipeline

Dzmitry Malyshau

14.1 Introduction

Texture mapping is a fundamental part of the contemporary rendering pipeline.

It provides various shading models with surface-varying properties, such as diffuse

color, specular color and glossiness, normal direction and displacement offset. Dur-

ing rendering, these properties become parameters of the lighting equation produc-

ing the final pixel colors. There are many ways to define the coordinates used for

texture sampling, such as prebaked UV, parametric projections, including the screen

position, world position, normal vector, reflection vector, etc. When applied to an

existing