However, that would cause the render to lose all the nice highlights seen in the reflections from the environment map. Here is a short tutorial about how to add a HDRI-image to your scene. One way to fix the excessive sampling noise would be simply to blur the environment map so that it's easier for the GI and glossy rays to hit bright areas. On the other hand, an HDRI of a thick overcast day with no sun at sight is very easy to sample.
Hdri Cinema 4d For Mac Free Free Cinema 4d C4D ocean plug Infinite Ocean 1.34 Cinema 4D R12-R17 Win / Mac Infinite Ocean is a plug-in C4D, you can make real ocean effect, HDRI sky background.
other hosts are currently under development including Maya and Cinema 4D. The new Release 8.1 updates the core Cinema 4D application and the optional Cinema 4D modules (if theyre installed). Corona was developed to be a high performance unbiased photorealistic renderer, initially for 3ds Max. An HDR image contains a tiny sun disc whose pixel values are in the hundreds of thousands or even millions, which is going to need a lot of samples for Arnold's brute-force hemispherical sampling to find. Recently, a new post shows how you can set up and HDRI sky in Corona C4D. Using a very high contrast HDR image for lighting a scene can produce noise which can be hard to get rid of simply by increasing the Camera or Hemi/Glossy samples. This section is mostly obsolete, you should be using the Skydome light instead.