at² GmbH recently updated m4d which gives you the mental ray and iRay the physically accurate unbiased and interactive renderer inside cinema 4D, to include some significant improvements in sampling and render speed.

Introducing the major new features in m4d 1.3.0 with Improved sampling and faster rendering and Team Render support

Büro Bewegt covers some of the more interesting features, noting that with m4d 1.3.0, you now have the ability to use Cinema 4D’s new Team Render feature to distribute rendering across machines using C4D’s familiar distribution environment. m4d 1.3 also has improvements to the caustic sampler, adding highly detailed caustics to renderings as well as adding LPE passes which will allow you to tweak the output from your iRay renders.

m4d iray for CINEMA 4D offers a free trial, and is priced at 590 Euros. To learn more about Mental Ray and iRay in Cinema 4D, check the M4D site here.