Hot tub round d1500mm from Bentwood

Hot tub round from Bentwood
Collection of similar models – https://3dsky.org/collection/shared/5082322 
4 models height – 1000/1100/1200/1400 mm.
Diameter – 1500 mm.
Each model has its own attached and internal ladders.
There are 4 types of wood material in the scene: Oak, bog oak, larch and cedar.
Hot tub D1800мм –
https://3dsky.org/3dmodels/show/kupel_kruglaia_d1800mm_ot_bentwood_1 
Hot tub D1170мм – https://3dsky.org/3dmodels/show/kupel_kruglaia_d1170mm_ot_bentwood 
Hot tub corner – https://3dsky.org/3dmodels/show/uglovaia_1_03_1_03m_ot_bentwood 
Bath – https://3dsky.org/3dmodels/show/vanna_bentwood 
The number of polygons is 96614.
The number of vertices is 101132.
Versions of 3ds Max: 2014 and 2020.
For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is adjusted taking into account PBR.
For those who work in VRay versions below 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward – whichever you prefer.
The archive contains STL, FBX (V-Ray and Corona) and OBJ formats