GPU Pro 5

III

Image Space

In this part we will cover three rendering algorithms that operate primarily in im-

age or screen space. While there are multiple reasons for working in image space,

one particularly nice property is that such techniques are usually straightforward

to port between different rendering engines, platforms, and architectures. Often

these effects require little more than some shader code and the ability to draw

a screen-aligned rectangle, thus making them easy to share with other graphics

programmers and technical artists.

Our first chapter, “Screen-Space Grass” by David Pangerl, describes an effi-

cient and unique method for drawing background ...