I have a handful of scenes that I have been experimenting on with IDL settings. To prep the scene I have been using the 'delete lights' utility and scene fixer to set ambient to zero for everything in the scene, yet can still see everything (although dim and dark, they still glow a bit). I've looked inside the material room but none of them have shaders, ambient is set to zero and the colour is black.

 

What am I missing here?