Cinema 4D’s motion graphics tools can lend themselves well to create animation for the medical world. This is probably why quite a few medical illustrators and animators will use C4D, and when speaking of medical or bio-scientific animation, creating a cell membrane is an old standby.
Here, Motion Graphics Artist Dennis Wei walks through creating a phospholipid bilayer, or Cell Membrane in C4D. The tutorial covers using some modeling techniques, and of course mograph and dynamics. Part two covers lighting, shading and compositing in After Effects.
You might also want to check out Travis Vermilye’s tutorial (older but still relevant), where he takes a look at using Cinema 4D’s MoGraph Module to create an animation of blood cells flowing in a vein.