Customizable Stackable Coasters

Change the image to use your own logo or graphic.

Example images included for reference.

Instructions:

• Use a app link Gimp or Photoshop to reduce your image to about 65,000 total pixels or less. About 256x256 but it doesn't need to be perfectly square.
• Invert the image if needed so that it is a black background.
• Optionally, add a 1 pixel radius blur after reducing the image to help make a smoother mess. (In Gimp this is the Gausian Blur under filters.)
• Save or export you image as a .PNG
• load the OpenSCAD file and change the image_file variable to the path of you PNG image.
• Important: Also change the image_pixels variable to be the actual width and height in pixels or your image. Other variables can be adjusted to your liking.
• render and save as an STL from OpenSCAD.
• Slice and print to taste.

Note: sometimes the STL from OpenSCAD directly might not load properly to the slicer. Use a program like MeshMixer to correct it if this happens.