I had been posted a thread before about developing photographic paper with pyro developer and make relief.
Answer was factory made emulsions are hardened and do not relief.
Last night someone was talking about softening the emulsion with ammonia.

I thought if we can soften the emulsion like homemade emulsions , we can do many things.
I thought if we additionally sensitize the softened emulsion
A- We can get a relief
B- We can get two layers of photograph from single paper or film one on other.

Ian Grant reported this commonly applied technology at high end but our emulsions are not suitable.
Now I ask how these folks do that and which emulsion is suitable ?

Is it makes sense ?

Good night ,