Bromine: disable the grass shadows + minor fixes
The grass shadows on Bromine don't look good IMHO. On Solarium, the grass doesn't cast any shadow and it looks perfectly fine. I think we could do the same thing on Bromine.
Before/after comparison: https://imgur.com/a/DcZmVAP
This MR also fixes this: https://imgur.com/a/xbKCvW8
Edited by Spike29