I'm creating a layered shader to fake a cell with an outer cytoplasmic layer and an inner nucleus layer. I've got two standard surface nodes, one outer and one inner feeding into the layered shader, each controlled by a ramp and a sampler info node. Trouble is, now there is no refraction rollout in Arnold, I don't know what to plug the ramps into on the surface nodes. The outer ramp I've plugged into the transmission weight, which give a nice transparent centre and a coloured ring ie works nicely. The inner node is a different story and no matter what I plug the ramp into on the surface node, I get a burning white nucleus and not a coloured nucleus. See attached shader image and rendered result. Please advise as to what I'm doing wrong?
Thanks so much,