No hyperthreading, no network rendering, and still no mulitiple undo. The undo, however, is slightly improved, and does work for more actions than it did in P5 (so it seems). Most of the enhancements done to P6 have come in the way of production. Meaning, there's more advanced materials, material room can be viewed in simple or advanced mode, rendering options are improved upon (for Firefly users), and lighting is enhanced (point light now available as well as IBL, soft raytraced shadows, ambient occlusion, and negative-intensity lighting). Some workflow enhancements include "wacros" for implimenting complex python scripting quickly, cached renders for comparing multiple renders, spot rendering for rendering specific areas of your scene without having to render the entire thing, shadow and texture caching for saving shadow maps and textures to memory so they don't have to be loaded every time you run a test render (increases speed), and OpenGL for more accurate shading in preview mode. These are all things I find invaluable now, and are not available in P5.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.