Reproduction steps:
1. Open the attached project.
2. Open the "SampleScene".
3. Click on the "Shaded" button in the Scene View.
4. Select another rendering mode (e.g. "Baked LIghting" or "Albedo").

Actual behavior:
- Objects will be rendered black.

Reproduced with:
2018.3.0a7
3.0.0, 3.3.0

Notes:
Possibly a regression.
Not reproducible with 2018.2, but the project doesn't move to this unity version properly.
Project also doesn't work with 2 and 4 LWRF package versions.