Hi,
Thank you for your swift replies, as always. I had some nasty spike multires artifacts around the eye. It took me a while to get those out. I often turn face orientation on to avoid bad normals when I fix those. I can’t see any red in the sculpt.
I took over the material that was in the pore depth Blend file. “Random Walk weight: 1 Radius 1-0.4-0.1 Scale 0.150 Anisotropy 0.0
When I reduce the scale to 0.05 there is definitely less of the black. But it’s not gone. Could it be that the subsurf is influenced by the proximity of the fold above it where their are normals that are intersecting. I have tried inflate that fold so it isn’t intersecting that much. But without much success