In the archive is a model of a residential building (7 floors including an attic)
also in the archive there are render settings (Corona)
Export File: Obj / Fbx
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The model is assembled as accurately as possible so that you can easily remove or add floors if necessary and taking into account the use in close angles.

if necessary you can disconnect all elements from the object with one click:
1- Translate an Editable Mesh Object
2- assign explode (in the Edit geometry tab) with a value of 100 confirm
* optionally translate back to Editable Poly
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Units in millimeters.
No third-party plugin or script required.
polys: 85 472
vert: 92791
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Who works in the V-Ray version lower than 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 – which is preferable for you.

For Corona render it is recommended to install a version of at least 1.5 since the glossiness of materials is adjusted for PBR

Enjoy your use and beautiful renderings!