Dev:Ref/Release Notes/2.68/Cycles

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Blender 2.68: Cycles


Official Blender on Windows has become significantly faster, getting closer to performance on Linux and Mac OS X. Especially scenes with much geometry will benefit from the optimization, rendering often 30% faster. Linux and Mac OS X also benefit but more on the order of 10%.


  • Support for NVidia Tesla K20, GTX Titan and GTX 780 graphics cards was added.
  • CUDA performance is also improved, rendering 25% faster on various graphics cards and scenes.
  • For users making own Blender builds: please upgrade to CUDA toolkit version 5.0 for best performance.
  • Hair rendering is now available on the GPU as well. (r56600)

New Nodes

Wireframe with Emission Shader
Toon (credit: Michalis Zissiou)
Cycles Wavelength node

Render Passes

Mist pass

Mist pass support was added, with start, depth and falloff control. This pass can be used in compositing to add fade out object that are further away, for example as a factor input for a Mix RGB node. If the pass is enabled in a render layer a Mist Pass panel will be shown in the world properties. (r57278)

Ray Visibility

Ray visibility is now supported for all light sources: lamps, emitting meshes and the world environment. Using these options it's possible to let light from these sources only selectively affect diffuse, glossy or transmission shaders.

Open Shading Language

Westin Sheen and Westin Backscatter closures were added for testing, useful for Cloth like effects. (r56900)