Redshift
Redshift is a powerful GPU-accelerated renderer, built to meet the specific demands of contemporary high-end production rendering. Tailored to support creative individuals and studios of every size, Redshift offers a suite of powerful features and integrates with industry standard CG applications. Redshift has the features and uncompromising quality of a CPU renderer, but at GPU rendering speeds. Unlike other GPU renderers out there, Redshift is a biased renderer that allows the user to adjust the quality of individual techniques in order to get the best performance/quality balance for their production. Redshift supports complex, advanced shading networks and texturing capabilities as required for production-quality rendering. Flexible, production-ready shader, compatible with PBR workflows of Allegorithmic Substance and Unreal Engine. Control how materials behave for certain ray types. Useful for customizing GI or double-sided polygon shading.
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NOX
NOX is a free stand-alone, physically-accurate state-of-an-art renderer. Its engine is based on unbiased methods. Global illumination is evaluated using Path Tracing or Bidirectional Path Tracing. Light behavior is based on laws of physics, however some simplifications occur. Many post-production actions can be done in NOX internally, so no additional software is necessary. NOX works with scenes created and imported from 3ds Max, Blender and Cinema4D. NOX is one of the most comprehensive renderers on the market and it is still under development at beta stage. It evolves and constantly gains new features. To make the best renders with NOX you need to know its philosophy of rendering. To achieve the best results read User Guide. Currently it covers features from version 0.3.39. The software made a long leap since then so we currently work on updated version of User Guide and want to release it autumn 2013.
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AIR
AIR is an advanced 3D graphics renderer with a unique architecture and extensive features designed for the rapid production of high-quality images. AIR is a hybrid renderer, combining the advantages of scanline rendering - fast rendering of complex scenes, motion blur, and depth of field - with the flexibility of on-demand ray tracing for accurate reflections, soft shadows, global illumination, and caustics. AIR supports a broad range of geometric primitives, including polygon meshes, trimmed NURBs, subdivision meshes, curves, particles, and implicit surfaces. All primitives are supported in their natural form; no pre-meshing is required. AIR also provides true (sub-pixel) displacement and high-dynamic range (HDR) input and output. AIR offers the flexibility of fully programmable shading and procedural modeling. Users can extend the shading language by writing new functions in any programming language.
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Kray
Kray is a state of the art global illumination renderer that allows very fast and accurate rendering of scenes where indirect light plays important role. It includes the most advanced modern algorithms and optimizations to allow it to render full global illumination, reflections, refractions and caustics quickly on standard computers. Fast global illumination: light/photon mapping – biased, but very fast and not much dependent on number of ray recursions, path tracing – unbiased with serval sampling optimizations, irradiance caching – for fast, view independent, reusable GI solution storage, caustics. Light models: point/directional, line lights, area lights, background light, HDR image based lighting, lights pre sampling. Instancing: allows repeated re-use of the same geometry in multiply locations in the rendered scene with very low memory consumption, instanced geometry can be also instances, even self cloning is possible with user defined number of recursions.
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