Screen Space Rendering Details

Design and implementation ideas for our screen-space rendering algorithms.

Overview

Scriptable like Fabric.
Chain together multiple filters to create an effect, e.g., bloom.
- Create chains using other chains as building blocks (also like Fabric).
- Pool or minimize intermediate textures.
Full-screen or custom size.
Tweak uniforms, e.g., brightness.
Read from color and depth.
- Name textures earlier in the pipeline and access them as input by name, e.g., a glow map or velocity buffer.
- Read different resolutions?
Render anywhere in the pipeline, not just at the end.
A built-in set of common filters.

Color Buffer only

Night vision. (simple algorithm. Game Engine Gems 2, Chapter 3).
Luminance (Graphics Shaders, Page 203. Orange Book, Page 534)
Brightness (Graphics Shaders, Page 233. Orange Book, Page 537)
Contrast (Graphics Shaders, Page 234. Orange Book, Page 538)
Hue Shifting (Graphics Shaders, Page 207)
Edge Detection (Graphics Shaders, Page 220. Orange Book, Page 552)
Toon Shading (Graphics Shaders, Page 223)
Gaussian Blur (RTR, Page 468. Graphics Shaders, Page 210. Orange Book, Page 549)
Bloom (GPU Pro, Page 551. GPU Pro 2, Page 296. RTR Page 482. Tutorial)
Glare (Programming Vertex Geometry and Pixel Shaders, Page 399)
Watercolor (GPU Pro, Page 557) - edge detect following by smoothing
8-Bit (GPU Pro, Page 557)
Kuwahara filter (GPU Pro, Page 247)
Gamma Correction (RTR, Page 141)

Depth Buffer

Depth of Field (Programming Vertex Geometry and Pixel Shaders, Page 406. GPU Gems, Chapter 23. RTR, Page 486. GPU Pro, Page 315. )
SSAO (RTR, Page 382. Programming Vertex Geometry and Pixel Shaders, Page 79. GPU Pro, Page 215. GPU Pro 2, Page 123)
Fog (RTR, Page 496)

Later

Motion blur using a velocity buffer (RTR, Page 490. Programming Vertex Geometry and Pixel Shaders, Page 410).

Resources

Water