Quote - > Quote - You are adjusting Ambient value or on the HSV ?

HSV and plugged into Alternate_Diffuse, but what difference would that make? If plugged into Ambient_Color and Ambient_Value used to adjust brightness, the math is the same.

I use the HSV because it is handy for saturation adjustments as well. But if I'm not touching Saturation then it makes no difference.

 

OK got it and thanks for reply 

 

Here is latest render,I've used only HDR and yours EnvSphere,no lights at all,HSV set at 8.0(although I didn't touched colour etc ),rendered with GC on via D3D Firefly,bounces 6,6000 samples 

 

Thanks,Jura