I made a simple indoor practice putting green with return ramps on either side if you are a horrible shot like me. I will update this model to return the ball from the hole when I have more time. This is a very low polygon model, just using it to build upon. This is meant for large 3d printers for now, later I will split the model up into pieces so you can put it together into a full scale version. This is a work in progress and may or may not work. You are free to do whatever with it as long as it's not for commercial purposes or financial gain.