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This instructable describes how to use a random googled image as a face for a Jack o' Lantern which can be 3d printed!
Download an image with a reasonable high resolution. Open this in the great free image editor Irfanview. Crop the image and convert to grayscale.
play with brightness and contrast untill you have a nice black and white image.
Copy the image into a vector editor like the free "Inkscape" and trace the bitmap to create a vector image.
Make sure the vector result consists of only single lines! Simply delete lines you dont want. Save the vector as DXF.
Add an extrude to the front-plane of a pumpkin model in your favorite CAD program. (I use CREO which is difficult to master but is fast and flexible) ...
Edit the sketch a bit to optimise the extrude untill you're happy with the end-result. Export to stl to 3d-print the model!
Model a 3D Jack O' Lantern in CREOby bj-2
3D Printed Jack-O-Lanternby jamie.baldwin
3D Jack-O'-Lantern in Blenderby Blueradio
Another 3D Printed Jack-O-Lanternby Rifle Creek
Animate a 3D Jack O' Lantern in GIMP (updated)by bj-2
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