Way 1 :
- Choose the model that you want to edit
- go to material tab, scrool down to “Reflection” section
- change from vehicle_reflection.tobj to fuzzy_reflection.tobj
- Export and pack
Note : this method will REMOVE all the relection on the part from sunlight
Way 2 :
- If the texture has AO, change the alpha channel to more darker
- If the texture has plain color you should make an alpha channel
- Open your .tga texture file into photoshop
- Head to channel tab ( if you dont see this menu go to Window > Channel )
- make sure to click on the alpha part
- press Win + L to open Levels tab
- adjust the value to what you want
- follow the lines on the image above, move the white slider to left to make it darker
- save it
- done
Result :
Before
After
Credits to : https://forum.scssoft.com/viewtopic.php?p=1507834#p1507834