GPU Pro 6

1

IV

Practical Screen-Space

Soft Shadows

M´arton Tam´as and Viktor Heisenberger

1.1 Introduction

This article describes novel techniques that extend the original screen-space soft

shadows algorithm [Gumbau et al. 10] in order to make sure that the speed of ren-

dering is optimal and that we take into consideration overlapping and translucent

shadows. We introduce layers, an essential component to filtering overlapping

shadows in screen space. We aim to render near one hundred properly filtered,

perceptually correct shadows in real time. We also aim to make this technique

easy to integrate into existing rendering pipelines.

1.2 Overview

Shadows are important ...