First of all, I'm a beginner in C4d. I am trying to make an object that will be safe for 3d printing (I'd like to do polished silver by Shapeways).
Does anyone have any experience with 3D printing? I'm not sure if I modeled this in a way that would cause a problem with printing. 12053_tincanv2.c4d.zip
I'm no expert, having never actually printed a model, but from what I've read it needs to be "water tight," meaning that there can't be any 2D surfaces. It has to have thickness and everything must be welded.
Your model has a lot of disconnected points which can be cleaned up with the Mesh>Commands>Optimize function. Beyond that, the lid isn't connected to the sides, it's 2D, and it has a hole in the middle.
A good way to check a model's integrity is to go to the attributes manager and select Mode (top menu)>Modeling. Then go to the Mesh Checking tab and enable mesh checking. That's give you a color coded display on your model of potential problem areas.