I'm using this code:
(store_current_scene,":current_scene"),
(try_begin),
(eq,":current_scene","scn_quick_battle_scene_1"),
(set_fog_distance, 30, 0xFFAA33),
(else_try),
(eq,":current_scene","scn_quick_battle_scene_2"),
(set_fog_distance, 14, 0xFFC64A),
(end_try),
])...