big_yx, little_yx = player.fov_stencil.source_yxyx(yx)
map_control = game.get_map(big_yx, 'control')
map_control[little_yx] = control_char
big_yx, little_yx = player.fov_stencil.source_yxyx(yx)
map_control = game.get_map(big_yx, 'control')
map_control[little_yx] = control_char