Cant add an alpha image texture

[manusd]

I need to add an alpha image texture from the inspector that I show in the photo attached. I can`t do it and if I add the texture directly in the nodegraph I lost the texture when I export a package. The link only works if I add a texture from the inspector but I can`t. I dont know if there is a solution that allow me to add this texture and preserve it when I export a package.

[manusd]

I Finally make the opacity map in photoshop. I think that is useless have a node like alpha image if it loses the link to the texture because it can be linked from the inspector

[ChrisHekman]

Good point, ill check if I can add the alpha channel of the unity texture as a alpha texture node in the octane override material nodegraph.