--get cells you're between
    local top = math.floor(y)
    local bottom = (top + 1)
    local left = math.floor(x)
    local right = (left + 1)
    --get codes
    local c_top_left = get_world_tile_code_raw(left, top)
    local c_top_right = get_world_tile_code_raw(right, top)
    local c_bottom_left = get_world_tile_code_raw(left, bottom)
    local c_bottom_right = get_world_tile_code_raw(right, bottom)
    if(c_top_left == c_top_right == c_bottom_left == c_bottom_right) then
        --shortcut before heavy operations it's applied often enough, that it's worth of additional if.
        return terrain_codes[c_top_left]
    end
    --calc weights
    local sqrt2 = math.sqrt(2)
    local w_top_left = 1 - math.sqrt((top - y)*(top - y) + (left - x)*(left - x)) / sqrt2
    local w_top_right = 1 - math.sqrt((top - y)*(top - y) + (right - x)*(right - x)) / sqrt2
    local w_bottom_left = 1 - math.sqrt((bottom - y)*(bottom - y) + (left - x)*(left - x)) / sqrt2
    local w_bottom_right = 1 - math.sqrt((bottom - y)*(bottom - y) + (right - x)*(right - x)) / sqrt2
    w_top_left = w_top_left * w_top_left + math.random() / math.max(scale / 2, 10)
    w_top_right = w_top_right * w_top_right + math.random() / math.max(scale / 2, 10)
    w_bottom_left = w_bottom_left * w_bottom_left + math.random() / math.max(scale / 2, 10)
    w_bottom_right = w_bottom_right * w_bottom_right + math.random() / math.max(scale / 2, 10)
    --calculate total weights for codes
    local totals = {}
    add_to_total(totals, w_top_left, c_top_left)
    add_to_total(totals, w_top_right, c_top_right)
    add_to_total(totals, w_bottom_left, c_bottom_left)
    add_to_total(totals, w_bottom_right, c_bottom_right)