GPU Pro 4

3

II

Decoupled Deferred Shading

on the GPU

G´abor Liktor and Carsten Dachsbacher

Deferred shading provides an efficient solution to reduce the complexity of image

synthesis by separating the shading process itself from the visibility computa-

tions. This technique is widely used in real-time rendering pipelines to evaluate

complex lighting, and recently gained increasing focus of research with the advent

of computational rendering.

The core idea of the technique is to presample visible surfaces into a G-buffer

prior to shading. However, antialiasing is complicated with deferred shading,

as supersampling the G-buffer leads to tremendous growth in memory band- ...