Hi AdeleAlli, thank you.
Hi VeroniQ,
The only object not from sh3d is the pillars, the one used here was previously used in the centre of a recent outdoor pool, i did originally have 2 cones, 1 inverted, and a cylinder, looked ok when tall but not short, all the rest are cylinders, walls, which provide the floor edging and the 3 horizontal pieces of the hand rail and rooms, 1 for floor only, 1 for ceiling only and with each individual tread being a room, opaque and exported.

Mike