Intro: Voronoi patterns consist of lines connecting points that are the centers of circles which intersect with the model's triangle mesh to create a tube like structure that replaces the original polygons. Read more here: (wiki) Delaunay triangulation.
These patterns can provide consistent horizontal cross sections for slices that might be helpful when using SLA / resin 3D printers. Voronoi models can print well on most Fused Filament 3D printers. See our "little Dipper" 3D Printer post and Instructable for more Voronoi 3D prints.
Step 1: Import Model and Reduce Polygons
Click [Import icon] or file > Import
Select entire model using keyboard Ctrl+a or use the select tool to click and drag certain areas. Edit menu appears at top after the selection turns orange.
Click [Edit] > [Reduce] while model is highlighted.
Increase percentage slider or change drop down to lower triangle / polygon count. Less polygons result in larger openings in the final model. It may help to try a very low polygon count or high percentage. Click [Accept]
Step 2: Apply and modify Pattern
Click [Edit] menu icon > make pattern
Change drop down to [Dual Edges] (generates pattern on exterior only) or [Mesh + Delaunay Dual Edges] (generates pattern inside model). [Element Dimensions] will make thicker or narrower tubes.
*Adjusting certain pattern settings may require intensive CPU usage.
*After clicking accept, you may want to reduce the new mesh polygons for easier 3D printing or importing into other programs.