Im running Unity 5.3.2f1 on Mac OS X 10.10.5 (Yosemite).
I have built a simple level with not much in it except a small river (using the water standard assets), a particle system (the fireworks, visible in the background of the pictures) a spotlight and a directional light.
When I start the level in Play Mode (using the Play Button in Unity) it looks like this:
However, when I load the level from another Level (using SceneManager.LoadLevel) it looks like this:
This happens regardless if in Editor, in a standalone debug build or in a standalone release build.
Can someone help me? Thanks in advance!