From Blender to Pepakura to Corel Draw to CraftRobo


Blender is an excellent open-source 3D modelling application. Pepakura Designer (short: Pepakura) is a very useful tool for papercrafting, which converts 3D models to 2D templates which can be printed on paper, cut and assembled into the original 3D model.

The two are a great combination for papercrafting. In fact, I found the combination of Blender for 3D modelling, Pepakura for unfolding, Corel Draw for postprocessing, adding artwork and finetuning, and finally CraftRobo for cutting perfect. Here is the complete workflow:

First, you need to export the Blender model to the 3D Studio format understood by Pepakura.

Go to

File > Export > 3D Studio

then save the file. Then, simply open the file in Pepakura. Once you have created a satisfactory 2D pattern, the next step is to get it into Corel Draw. There are several vector export formats available in Pepakura, however all of them have some problems. I found the best one to be DXF (AutoDesk’s ‘Drawing Interchange Format’).

In Corel Draw, click on

File > Import

then select ‘DXF AutoCAD’ as file type and select the file exported from Pepakura. You will then be able to place the file into your existing page, by pressing LMB and dragging the mouse until the shape has the correct size.

Note that the DXF format separates the shapes for folding and cutting into different layers, which are preserved in Corel Draw. This is very convenient when you want to process them differently (such as assigning them to different cutting types for the Craft Robo).

One important drawback of the DXF format is that Pepakura chops up the outline of a shape into individual edges. This can be difficult to work with in postprocessing. Therefore, another option is to use the EPS format. Here, you need to carefully c0lor all cutting edges in the same color in Pepakura. This will create a contiguous outline in the EPS file. Unfortunately, the EPS file does not preserver the color information itself, so all edges – folding and cutting – are black, and you have to separate them manually.

You can now add artwork and edit the shapes, if necessary. Once that is done, you can simply send the file off to the Craft Robo for cutting. I keep the folds and cuts in different layers (see above) and assign the following cutting parameters:

Folds: Index 90lbs paper, 10cm/s, force 30, line type: Custom 1 (0.120 cm a, 0.120 cm b), Passes: 1

Cuts: Index 90lbs paper, 10cm/s, force 30, line type: 1, Passes: 2

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  1. Daryl dalore, Reply

    Hi, I just want to ask, how can I export my UV layout from blender to Corel without affecting the real size of my mesh, I want to export the layout but without affecting the size, example my mesh size is 2ft height 2ft width, then after I export the layout and import it in Corel, the size of it changed, I need this to my work, hope u can help me…. Pls pls pls reply tnx

    1. admin, Reply

      Hi Daryl, it’s extremely difficult to preserve the size when exporting an UV image mapped onto a mesh into Corel Draw. The problem is that the multiple steps you need to take before you get from Blender to CorelDraw make it difficult to control the scale at each step.

      What worked best for me (much better than actually trying to control the scale) is to add a simple square to the Blender scene, with a known size. Export everything, and in CorelDraw just measure the width or height of the square, then scale accordingly.

      For example, let’s say the square has a size of 20 x 20 units, and a unit is supposed to be 1 inch. In CorelDraw, the square turns out to be 15 x 15 inches. You would then have to scale all exported objects about a factor of 20/15*100% = 133%.

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