And now the same thing as a shader in Eevee/Cycles. I used Voronoi to generate the grid and then I mixed it with an image texture in basically perfect proportions to make it appear as a dot.
I'm trying to figure out holo stickers in Octane. Everyone's really close with their ideas, but it's a bit trickier than it seems and so far I've seen maybe 1 good holo shader out there that works like the real thing.