求翻译：由方形浅灰色瓷砖组成的卫浴间，每一片瓷砖的图案都不尽相同，画家信手涂抹留下的痕迹成为空间最好的装饰。是什么意思？

Made up of square light grey tile bathroom, each piece of ceramic tile patterns are different, best marks become space left by the artist readily applied decoration.