I have a way to generate .ply files of 3D models, with color attributes added to each vertex. I am importing these to blender, and the attribute node makes these colors visible in my material.
I have been trying for a while now to have the alpha channel define transparency for some of these nodes, but it seems like cycles does not support an alpha channel?
My plan B has been to color all the vertexes I want transparency for - in one color (for example black), and then make all the black vertexes transparent. Does anyone know how to do this?