cool idea, but i need the viens to be polygons--they need to be 3D hollow objects. so I can pan the camera around and view them from multiple angles--not just surface texture.
any ideas on that?

I need to model viens--basically organic looking tubes that bifurcate, and re-bifurcate, while getting smaller. (For example picture all of the viens in your arms as they taper into your hand,...