Pin Art 'Hologram'
Not biohacking, but something that occurred to me, and there's people here who could probably have a go at it.
Anyhow, ya know these 'pin art'.
Firstly, this computer controlled, to output a 3d model. It would actually be inverted from that, so imagine that hand going in rather than coming out, semantics though.
Secondly, it would need a membrane.
and thirdly, you'd need a light.
I thought about it when looking at this lamp. That Pharaoh head is carved into the plaster, and when the light is on, it comes out, it looks 3d.
I thought perhaps, it could animate, a face, or something. As the pins pull the membrane in, the light causes the 3d effect, sort of a hologram effect.
If I were to do it, I'd start with a static cube, and then a rotating cube. I am not going to do it, I couldn't.