No matter if the light is turned on or off. The room below isn’t lit up at all.
How can i realize this? I already googled a lot and played around with reflections and stuff. May someone point me to the right direction?
It also looks kinda unrealistic in the top left corner, doesn’t it? (bottom picture)
I’m not 100% sure what you’re asking for but it sounds like you want some kind of dynamic global illumination. If so, there’s at least one product on the unity asset store for that. As a quick and cheap hack, you can just increase the ambient light level in the RenderSettings whenever you think it necessary.
Unity has a built-in lightmapper that works for most situations. The lightmapper is a tool that calculates the effect of lights bouncing off walls and lighting up the room. It is what makes the environments in modern games look so realistic. You can read about the lightmapper here:
http://docs.unity3d.com/Documentation/Manual/Lightmapping.html
The built-in lightmapper works great for most situations. The limitation is that it does not work with lights that move. If you really need to have moving lights that bounce off walls and light up the room dynamically, then you need to have a realtime global illumination shader like @MakeCodeNow was talking about. He was probably referring to the “RedLights” shader available on the asset store for $80:
https://www.assetstore.unity3d.com/#/content/8120
I picked it up on sale and it worked pretty good. The only flaw I found was that the reflections do not show up reversed like they would in a mirror. I would go with the built-in lightmapper unless I really needed the realtime illumination.
