I'm using a normal and diffuse made from photogrammetry, but Bitmap2Material only accepts a diffuse. I don't want to lose the details of my normal. :( For context, it's a dirt texture and a concrete one.
Sorry, I can't understand from the discussion, are we talking about blending two textures together, or about making a texture tiling? I mean, where is the problem :) As for Bitmap2Material, you can put textures in all slots, not only diffuse.
Personally I wouldn't try to make the normal map tile at all. - I would make a tilable height map and diffuse map, then make the normal map from that - either using Substance, or projecting the height map as a displacement in ZBrush/Mudbox and baking it out as a normal map.
You are right. As far as I understand, the workflow is putting photoscanned piece in Zbrush and extracting diffuse, normal and other maps from it. Then if you put all these maps in B2M and use Make it Tile option, you'll get all your maps tiled. Or you can use Substance Designer node for the same result. It won't probably…