GPU Pro 5

6

II

Wire Antialiasing

Emil Persson

6.1 Introduction

There are many sources of aliasing in rendered images. The two most common

culprits are geometric edges and shading. Historically these sources of aliasing

have been resolved by Multi-Sample Antialiasing (MSAA) and mip-mapping with

trilinear filtering respectively. With mip-mapping and trilinear filtering, which

were supported on consumer-level hardware even way back in the 1990s, textures

on surfaces were essentially free from aliasing. In the early 2000s, as consumer-

level hardware gained MSAA support, the remaining problem of edge aliasing,

often referred to as “jaggies,” was more or less a solved