Hi Jonatan @JonatanL ,
That could also be because of the Subsurface Scattering.
That seems to be too much in your Image and maybe uses the wrong method (should be Random Walk (Skin) in Blender 4.0+ with a Weight of 1.000 and a low Scale, or just Random Walk (not the Fixed Radius one), in older Versions, with a low Subsurface value). In even older Versions (like 2.9 or so), the SSS methods were slightly different, if I remember correctly, but then they would be like in the Course.
