Transparency on Instanced geo

I’m trying to recreate an effect where a lot of “small beans” draws an image.
I using geo instancing, pretty straight forward, but I’m struggling with the opacity effect of the reference.

I read a lot on the transparency in TD, without understanding it completely, and I tried a lot of materials, render settings and blendings, but it only seems like TD supports alpha, and not opacity?
I also use a TOP for controlling alpha instance.

Any way to make them actually opaque, and not just alpha lying on top of each other?

Reference and outcome: