[mxfh]

If you're willing to sacrifice a color just use triangles/prisms the faces could then just be virtually adjacent and still rotate independently

https://excalidraw.com/#json=driyv7dR-eODBzuh_hdrk,93QQvkYae...

[mxfh]

I guess the patents are long expired now and don't really apply to pixels, but that concept exists already for non-pixelated images and sadly these are replaced mostly by LEDs now in the wild:

https://www.rotapanel.com/trivision-mechanism-and-prism-type...