It's weekly time!
Changes since the last build:
-The layered material is here! This material takes up to 4 other materials, and combines them into a stack. Each material has an opacity for its layer. You can use this to make arbitrary multi-layered materials
-The "Show Side Panel" shortcut has settled on command-option-I
-Hybrid bidir. isn't finished yet. It still has several errors, and is missing several important features found in the regular bidirectional integrator (all-uniform light sampling, MIS, tracing shadow rays through null or arch glass, to name a few I understand)
-SPPM images are darker than the other rendering modes, and oddly seem to grow darker as the renderer runs.
-Layered does not properly handle specular mats, and has some performance issues
There are two builds, one is the "normal" build, other other a special optimized build. Let me explain these two a bit. The normal build uses the same settings that all the OS X weekly builds have been using for about a year now. They will run on any Mac that has a 64bit CPU and is running 10.6+ (the notes say 10.6.8, this is a reminder to keep your machine up to date.) The other build is my personal build (meaning the one I use myself), with a whole bunch of optimizations for my box turned on. It won't work on everybody's Mac, but it should work on any Mac that; A, has a Core i7/i5/i3 or equivalent Xeon CPU, AND, is running 10.7. ("equivalent Xeon" means the 2009 and 2010 model Mac Pros. If you have a Hackintosh, well, the technical reason is that this build requires SSE4, figure it out from there)
If you aren't sure if you can run the special build, or don't want to bother, just download the normal one. Although, the special one should be a bit faster (5-10%, I think, been awhile since I tested it).
So without any further ado…Normal build (10.6/10.7, 64bit only): http://graphicall.org/78/
Optimized build (10.7+SSE4.1 CPU[Core i7/i5/i3] only): http://graphicall.org/148/