Use ^ to combine the standard "off cathodes" image with the various individual "on" digits. recolor images to give them a reddish glow around a bright orange element
216 B
32x32px
216 B
32x32px
![](/blocky_portaling/nixie_tubes/raw/commit/c3bd35fa594783cf232e0b4a7b25946d70da7e1f/textures/nixie_tube_cathode_period.png)