Should work without any extra effort. Shader compatibility settings should be included and applied in the package.
Just add a Flammable object script on the parent/LOD object of your prefabs or use the “Convert” function in the hierarchy menu. Some things are different for different prefabs:
- If the grass prefab is in a large area, you might want to check “Use mesh fire” for better effect, since usually small flame emitters look better.
- In case of a tree you can use manual box colliders to place the flames at certain locations to draw attention (if the player is on the ground it will only harm performance if the flames are in places the player cannot see. Or use automatic mesh fires.