appleseed is a modern, open source, physically-based global illumination rendering engine primarily designed for animation and visual effects.
appleseed is actively developed by a small, international team of talented volunteers from the animation and VFX industry. Its core mission is to provide
... [More] individuals and small studios with a complete, reliable, fully open rendering package.
Over the years appleseed has been used on several projects including TV documentaries, ads, promotional videos and an animation short, "Fetch, a very short film": http://www.fetchaveryshortfilm.com/ [Less]
The rendy project aims to produce an advanced photorealistic 3D renderer (based on ray tracing), designed in a completely modular fashion.
Each part of the rendering process is handled by separate programs acting as filters on a UNIX pipeline. The core renderer itself is driven by geometry and
... [More] shader plugins, and is completely agnostic to models of illumination or object types, and thus can be extended quite easily to support any kind of data set, reflectance model, or rendering algorithm. [Less]