- https://github.com/gafferHQ/gaffer
- http://www.gafferhq.org/documentation/0.54.1.0
- https://image-engine.com
- http://image-engine.com/wp-content/uploads/2018/04/101_040_600_AO.1006.jpg
- https://www.solidangle.com/arnold
- http://www.3delight.com
- http://opensource.imageworks.com/?p=osl
- http://appleseedhq.net
- https://renderman.pixar.com/products/tools/tractor.html
- http://www.openexr.com
- https://sites.google.com/site/openimageio/home
- http://opencolorio.org
- https://github.com/ImageEngine/cortex
- https://groups.google.com/forum/#!forum/gaffer-dev
- https://vimeo.com/cortex
