Hi I was testing to make a scope and i couldn't get the reticle GUI to appear.
After some investigations i have seen that when doing a copy paste of properties betwen two emats (being the source in this case the Optic_PSO_PIPMaterial.emat) the propertie "Albedo Map" is written like these "{4937682A31ED585A}$rendertarget" changing it to "$rendertarget" make it work.
I don't know if it is a CopyPaste issue or a bad management from the propertie but i think it should be solved to aboid troubles.
Thx