I've been quiet on this project for a while now. I started getting distracted when I could not get two WS2812b leds to talk to each other but yesterday night I decided to to do quick test of how well a segment will light up and I wanted to see how large an segment will be. Up until this point I only had printed a 1:2 scale segment ( its in the gallery) and I wanted to see how large a segment will be , turns out I wanted huge segment. In the image i put the segment more upright than what I plan it to be.

To construct this segment above I started with a 1:2 scale segment and laid out some masking tape and doubling each length. I then roughly cut out some wax paper on it such that it goes past the masking tape lines. Then I added the black electrical tape to stick the wax paper down and provide some optical contrast. I then roughly placed an led behind the glass about 10cm away and took the photo below:

In real life the light is much more even. I blame my cellphone camera for the bright white spot. To the eye only the upper tip is faded a bit. I reckon i need about 2 or maybe 3 leds to light up a segment evenly. This is good news because i plan to use about 7 leds on each segment. The total length of the a single segment is about 21cm meaning a whole digit will be close to 50cm.