Heres a bunch of Naiad simulation playblasts and RD from a project ive been working on for some time.
Most of this stuff is long gone or now redundant within the project it was developed for - of which i hope to release some time within the new year.
Here's an epic 1 hour 15 minute tutorial showing various ways of creating holes in objects using Cinema 4D.
Hard surface modelling holes
Subdivision surface modelling holes
Using "Point to Circle" script
Using "PolyCircle" plugin
Creating holes using splines. How to use the SplineMask object
Creating holes using Booleans / Boole Object
Faking holes with Materials using the Alpha channel
You can download the Circle to Spline script and the Polycircle plugin at c4dcafe.com in the downloads section.
If you have any questions please ask in the forums at c4dcafe.com. Please support the cafe by joining our supporter's club for a very modest US $10. This will keep the tutorials coming.