Thats nice looking hair Steve ,I had a prob with the shine on it myself but found a setting that contrld it ,I will have a look see if I can remember
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The only thing I can find is the brightsess under the emiter is set to 60% I am using IBL ,don't know if that efects it though.Did you try adding another emiter ,I done it a few days ago and it worked good ,I used a darker image with it