3D print a forest of unique trees using Thingiverse Customizer. With about a dozen parameters, the Customizable Tree allows you to easily generate all the flora your inner arborist desires. We just upgraded Customizer to a more recent version of OpenSCAD (2013.06), so we created the Customizable Tree to show off some of the new features. It now supports recursion, or the process of repeating similar shapes, in modules and functions and the scaling parameter for linear extrusions which allows the tree branches to taper. Additionally, the tree customizer uses a new library we wrote for handling 3D vectors and a small library for converting hue-saturation-value colors to RGB. The 3D vector library comes with some helpful functions for rotating vectors toward other vectors as well as a module for visualizing vector paths. Now that we’ve upgraded, we can’t wait to see what kinds of recursive designs you come up with!