Master bathroom interior design ideas - Open Up the Space. Give your master suite flow with French doors and glass walls. Instead of a basic doorway between this master bedroom and bath, architects visually opened up this master suite by designing a glass wall as a divider, with grommeted curtain panels that can be pulled for privacy. An Accent Wall. Two vanities, each with a sink and a mirror, or one long vanity equipped with two sinks are common design elements for today's master baths…