Under the Advanced tab of the settings there is an artificial light brightness slider.
You can also play with the exposure (General tab) and contrast (Image tab) to see what happens.
(I have run into the same thing in the past and had to resort to using big rectangular infill lights closer to the area I want illuminated.)
Like Gadget wrote I would adjust the general exposure so that your output is brighter. You should get very low light effects visible.
Drawback (known from Rhino): maybe you don't get the intensity of emitters low enough anymore (for TFT screens). But maybe it's a Rhino issue only.
An other dirty way - use more lights at the same place. Two lights at 100 should be the same like one light at 200.
I took Gadgets advice, worked for my needs on this project, thanks
Interested to see what your image looks like.
