In the archive, there is a 3ds Max 2018 scene for Corona and V-Ray + fbx files.

The Displacement map works on the materials.

Polys: 256,485
Verts: 257,893

The dimensions of the model are specified in the description for the set of all objects.
In the set:

- Pamir Garden Cushion, Flax. John Lewis x Sanderson
https://www.johnlewis.com/john-lewis-x-sanderson-pamir-garden-cushion/flax/p112996297 

- Cotton Velvet Cushion, Soft Teal. John Lewis
https://www.johnlewis.com/john-lewis-cotton-velvet-cushion/soft-teal/p5065057 

- Cotton Velvet Cushion, Green. John Lewis
https://www.johnlewis.com/john-lewis-cotton-velvet-cushion/green/p5065057 

- Cotton Velvet Bolster Cushion, Olive. John Lewis
https://www.johnlewis.com/john-lewis-cotton-velvet-bolster-cushion/olive/p111883695 

The model uses Corona Legacy Mtl. All objects and materials are logically named, and the material maps duplicate the names of the materials and the slots to which they are connected.

The renders for the preview are made in Corona Render 9.3.

For Corona Render: it is recommended to use a version no lower than 1.5, as the glossiness of the materials is configured with PBR in mind.

Material conversion to V-Ray was done using the V-Ray scene converter. If you are working in V-Ray version lower than 3.1, please be careful. In the materials under the BRDF section, Microfaset GTR (GGX) is set; if your version is older than 3.1, the BRDF field will be empty. Choose Blinn, Phong, or Ward – whichever is preferable for you.