GPU Pro 6

3

IV

Shadow Map Silhouette

Revectorization

Vladimir Bondarev

Shadow Map Silhouette Revectorization (SMSR) is a two-pass filtering technique

inspired by MLAA [Jimenez et al. 11] that aims to improve the visual quality of a

projected shadow map by concealing the perspective aliasing with an additional

umbra surface. In most cases under-sampled areas result in a higher shadow

silhouette edge quality.

SMSR is based on the idea of reducing the perceptual error [Lopez-Moreno et

al. 10] by concealing the visible perspective aliasing around the shadow silhouette

edge.

3.1 Introduction

Shadow mapping [Williams 78] is known for its compatibility with rasterization