In Fabia_R5_evo.ini

ON:
[e_bumper_f_tarmac]
Switch=false
SwitchBox=light
Predicate=NotUsed
FaceBlock0_Shader=CarPlastic
FaceBlock0_Material=external::carpaint

OFF:
[e_bumper_f_tarmac]
Switch=true
SwitchBox=light
Predicate=NotUsed
FaceBlock0_Shader=CarPlastic
FaceBlock0_Material=external::carpaint