sprite_create_from_tiles()

function sprite_create_from_tiles() {
    var _w = sprite_width;
    var _h = sprite_height;
    if (_w == 0 || _h == 0) return;

    var _cliffTopZ = z + height;
    var _spriteHeight = _h + height;
    var _surface = surface_create(_w, _spriteHeight);

    #region Draw tiles to surface to create sprite
    surface_set_target(_surface);
    {
        draw_clear_alpha(c_black, 0);
        var _layers = layer_get_all();
        for (var i = array_length(_layers) - 1; i >= 0; i--)
        {
            if (!layer_get_visible(_layers[i]) || layer_get_name(_layers[i]) == "Whitebox_Day" || layer_get_name(_layers[i]) == "Tiles_Day")
                continue;

            var _tilemapID = layer_tilemap_get_id(_layers[i]);
            if (layer_get_element_type(_tilemapID) == layerelementtype_tilemap)
                draw_tilemap(_tilemapID, -x, -y);
        }

        gpu_set_blendmode(bm_subtract);
            draw_rectangle(TILE_SIZE/4, TILE_SIZE + 2, _w - TILE_SIZE/4, _h + height, false);
            draw_rectangle(0, _h + height - TILE_SIZE, _w, _h + height, false);
        gpu_set_blendmode(bm_normal);
    }
    surface_reset_target();
    #endregion Draw tiles to surface to create sprite

    #region Create sprite and create collider/bbox
    var _sprite = sprite_create_from_surface(_surface, 0, 0, _w, _spriteHeight, false, false, 0, 0);
    sprite_collision_mask(_sprite, false, bboxmode_manual, 0, _cliffTopZ, _w, _h + height, bboxkind_rectangular, 0);
    #endregion Create sprite and create collider/bbox

    sprite_index = _sprite;
    image_xscale = 1;
    image_yscale = 1;

    surface_free(_surface);
}