I just wanted to share with everyone a free resource I found on the web on creating volumetric effects in C4D using shaders and volumetric lights. Based on the 2018 date of the tutorial, it is centered around R19 (definitely pre R20 as there is no nodal shader system mentioned) but still the techniques and background information provided still make it relevant and worthwhile. The instructor, Marc Potocnik, also explains things in a very straightforward and clear manner.
Marc also solves a long standing problem I have faced and that is the realistic creation of volumetric clouds in C4D without the need for plugins, particles, Xpresso and/or fluid simulation. This will be very handy for those who want to create hyper realistic shots of the earth from space where the clouds actually have some volume to them and are self-shadowing. I also found the rendering times to be quite acceptable. My first attempt following his techniques are shown below:
The tutorials can be found here:
Surprising Volumetric Effects in Cinema 4D Part 1: The Magic of Visible Lights
Surprising Volumetric Effects in Cinema 4D Part 2: Erupting Plasma and Sliced Clouds