Hi Glen

I would recommend to use Dimension 3D Render Firefly script with which you will have lot more control

Here are my Firelfy settings,if you have 4 core CPU/8 threads then in column Number of threads put 8

And my test renders,its simple dirty render,in this one I upped bounces to 3 an Intensity to 1.65 which hasn't been best way

Cropped arm with hair,hair is from Exnem

and updated lights plus settings used above(render took 5 minutes) with IDL,SSS etc

And last observation,don't use Depth traced shadows with IDL,try use Raytraced shadows and try not to use too many IBL lights,IBL shouldn't be used with IDL,should be used in normal rendering and not with IDL,sometimes Depth traced shadows can cause issues down the line like splotches

Hope this helps

Thanks,Jura