I need an advise how to set up my lighting in the attached scene. The whole scene is very dark and I can't find a way to control the lights brightness.
Hay Phillip, When you use global illumination via the VEX GI shader, you should dedicate one light/light template to the shader, and just leave it at the default location. If all you want is some ambient occlusion effects, you can leave it at that. If you want to add some actual scene lighting now you need to create new lights (they won't need the shader).