When we were thinking about a hamam, in spite of ergonomics, we were very much concerned about shaping. All the masters we knew offered +- the same scheme for organizing the frame. All of this was crowned with the use of GKLV, with all the consequences. Then we decided to use a robotic arm for milling PSB-50 into the desired form smoothness.
We got a LEGO that remained to be assembled inside the space, installing communications, reinforcing with mesh and waterproofing before laying the mosaic. Styrofoam is an excellent thermal insulator, the speed of erection of such a structure, given the fluid shapes and complex joints, the speed of construction was high.
And the final result with the help of GKLV certainly could not be achieved. Among other things, as part of the author's supervision, we helped the executors in complex nodes, having previously prepared a 3D model and tested everything on it.