The subdivision smooths out my geometry just fine in the Octane render preview window, but final Picture Viewer render from C4D clearly isn't subdiving all the way?
Is this fixed by changing the geometry engine / control settings in Octane render for C4D? Any ideas?
WELP, fixed this problem. It does not have anything to do with the geometry engine settings for Octane, as other posts here indicate. In my case, I needed to change the Subdivision Renderer attribute on the Subdiv object to a higher number than the Subdivision Editor attribute. Per this image in the Octane manual: