This is single walled print,

3D Printing
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This is single walled print, the 3D design is applied by post processing the GCode with ExtrusionPainting.

This was created by modifying @Mark_Wheadon 's brilliant #VelocityPainting technique to adjust extrusion instead of print speed. Mark’s technique is here: Home · MarkWheadon/velocity-painting Wiki · GitHub
This was created by slicing a simple cube. Then I ran the script, which applies an image to the GCode. The pattern was created by increasing the extrusion, pushing out more plastic and creating a 3D pattern.

More information on the extrusion painting modification here: Extrusion Painting | 3D Printing | Code and Science
I’ve uploaded the code to GitHub here: GitHub - napter/velocity-painting: #VelocityPainting Python:: patterning 3D prints by modulating the print speed (Python port) (unfortunately I do not know Perl and so I had to fork Mark’s code and translate it to Python to make my modifications).

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very interesting, i’ve been playing around with displacement maps to apply textures on objects, but this seems like a much simpler solution.

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It would be interesting to see if combining the two techniques could yield anything interesting. Whatever it takes to make things as complicated as humanly possible :wink:

It does beg the question: can you print Braille on any surface using this?