I try to set up a realistic studio. To achieve this I added the environment to my scene which is used in sandbox.
Initially I thought that the models will be totally black until I add some light to the scene and the environment is just for reflections. But I noticed that the environment is kind of a light source itself. The sandbox has no light too but the model is still visible. This is due to the environment irradiance of the PBR, am I right?
To make the scene more realistic I want to add shadows. But here I encountered the problem that there is no light which I can add to my shadowGenerator. So is it possible to create shadows with the environmental lighting? Or do I have to create a light at the positions of the lamps? If yes, will the light conflict with the light of the environment? What would be the best practice?
I am very curious about your answers.