it´s the Blue Moon Rendering Tools, a shareware Pixar Renderman clone.
It has pros and cons but you can have it for free under the
shareware restrictions and it works well.
I was able to check it out a couple of years ago with Linux+X, now it´s available for Win95/NT. I picked up an early Win95 Version and was not able to get it running. Now I gave it another try and get the new Beta Version 3.2.6 and it worked out of the box.
You can call Larry Gritz Dr. now. How did that happen?
People say BMRT 2.4b is extraordinaire optimized on Win95 compared with 2.3.6. The piston is done twice as fast.
bmrt_test.zip 90k, RIB
Here's the first pic that I made with Rhino. It takes only a couple of minutes to install and "learn" the basics of rhino. It is exported to *.rib and rendered with BMRT. I read a webpage about calling BMRT out of Rhino but I prefer to edit the *.rib file by hand and to have a preview first and then start rendrib.
[eine8.rib] eine8.rib PRMAN Format 8k
[eine8.zip] eine8.3dm Rhino3D Format 67k
By the way, Rhino also exports VRML1 [tucovr.wrl.gz]