Hi,

It's a combination of the standard V3 texture map and then a lot of shader nodes to add fastscatter, tweak the specular settings, add some noise and texture (spots etc.)

Tweaking the lighting is fairly easy once the shaders are set up, though there is a large interaction between the correct specular settings in particular and the lighting set up - as I have it here, then yes, it is burned out a little from above. Here is another shot with subtly different lighting