Lights - face flicking

Hi,

Modifying the tutorial 15 model by changing some lights I get flicking faces (only the lighting, the material is fine) some times when I move the camera.
Which could be the reason?

Thanks

Can it be that the cstart of the camera is a small value? Try to put a value like 1.0 for cstart and 200.0 for cend. This kind of ratio gives good results. If you want an example of dynamic lights applied on a scene, check the MeditationGarden source. This will help you alot about how to build and prepare your scene (and code) for proper lighthing using SIO2.