@luca @nationsblind @BPI @mastoblind It's plastic made. But it has textured tactile shapes on it: one face is smooth (generally the white), another has squares, another has full circle, another has 9 dots for each cubie, another one has crosses (plus signs), another has empty circles. Unfortunately there are no conventions for tactile cubes, but in his book, Paul Martz suggests that if you want to 3D-print your custom textures, you shouldn't use direction-dependent symbols. I mean, figures which change their feel when you turn them by 90 degrees. A square is OK, a circle is OK, but not a rectangle or triangle. A 5 pointed star, might be OK, an hexagon as well. A cross should have its 4 arms of same measure and perpendicular. That's why I said "a plus sign", because generally the X has two small and two large angles.
Even though there is no convention on tactile shapes for cube, having direction-dependent figures might change your mind's focus. You concentrate more on how the piece is turned, than in the cube's information itself.
For instance, do you need to solve an edge? You must find the cubie meeting this criterion: its 2 perpendicular faces must match your down-side and front-side centers.
My first cube, built by my best friend, has direction-dependant shapes and I found myself stuck, as I had to find the capital-T shape, and arrow-shape. I gave up and took my other cube. #RubiksCube #speedcubing #accessibility #a11y #blind
