Fix weapon reflection in r2
There is no reflection on weapons. See MP40 - spawn as axis on radar and move the weapon.
renderer2: good day ambient lighting fixes #1082
- added a scale factor for ambient lighting in entity renderer - based
on a patch by Thunder
- disabled r_forceAmbient so we are using world ambient lighting ^^
- set r_normalmapping and r_materialscan cvars to better values (users
require additional assets which are not shipped)