Short tutorial for producing polar patterns: 0. Draw an image into a circle. Examples done in Inkscape are in src_images/ 1. Export the image as a 640x640 bitmap, from command line: $ inkscape -f svgfile.svg -w -h -e file.png 2. Open the exported image in GIMP (examples are in src_images/raster) and reduce the colors (e.g. to 4 colors). The Posterize tool may be used to reduce the colors. Consider also increasing the contrast. Examples of color reduced images are in src_images/raster_post-processed 3. Create the polar pixel map using either: tools/depolar_resample_IMAGEMAGICK.sh or tools/depolar_resample_PIL.py 4. Some rough retouching on the polar pattern can be done in GIMP: - A full circle is represented by a horizontal line; - A radius is represented by a vertical line. 5. Do the final touches to the polar pattern with PoPiPaint> Examples of fine tuned polar patterns are in patterns/ 6. Export the pattern as animation and upload it to the JMPrope.