Hi there
In essence this a standard shower pan with an ipe deck built over it. We built a slopes pan with a center drain and waterproofed it first. Than applied tapered sleepers with drainage holes over that and invisibly fastened the ipe. We supplied a cleaning and maintenance kit to our client when she moved in and she reports that it has not been a significant burden to keep it clean. The glass is custom.
Hope this is helpful!
Sean Flynn