I'm not sure why this model looks so dark on Sketchfab. Kiri Scan exported it as an OBJ file, even though I asked it to form a GLB file. Very strange. I discovered that for some reason shading had been set on the model when exported to an OBJ file and uploaded onto sketchfab. I turned off shading, and the model looks well lit now. Found this skull on a badger sett survey. Worked out a way to scan all round the skull using a cake decoration turntable.