Use your fingers or mouse to control model (hold shift key or use mouse wheel to zoom it). Press H-key to hide dat.GUI controls. You can change ramiforms and couples of twigs by bending angles (in radian) and integer rotation step (rotation angle is π rot / 9).

Procedural tree with tripling twigs (3D WebGL model).

Modeling the Mighty Maple for Web     updated 6 May 2015