All Characters are bright in the Perspective View

Hey there, hope this is the right Section to ask for Help.
I loaded a Environment (Biorobot Lab 1) and all Characters looks like there is a Camera Light on but there is nothing,
Now I start a New Scene and load a Character or Load a Scene, Scene Subset, everything looks bright as hell now.
I don't know how to fixthat..


Screenshot12.png
493 x 367 - 144K
Comments
What is the current setting for Auto Headlamp in the editor tab of Render Settings?
I've already checked and even if I turn lights on or off under window and preview, nothing changes.
It's like the environment I loaded changed an option but I have no idea what it was. Resetting the settings doesn't change anything
Edit>Preferences (Daz Studio>Preferences on a Mac)>Interface has a couple of possibly related settings - Per Pixel Shading is the one i ercall making a difference, but Backface Lighting might have been involved too/instead.