This is a paid asset, but now you can download 3D Showroom Level Kit Vol 3 Free.
Detail this asset from Unity Asset Store: Original Link
3D Showroom Level Kit Vol 3 v1.2 (Latest version)
3D Showroom Level Kit Vol 3 v1.0
3D Showroom Level Kit Vol 3 is a prefabs kit (+70 prefabs/meshes), to help you to create high tech neutral showrooms interiors.
Present your products in 3D or VR! (projects presentation, vehicles, multimedia events, interactive applications etc…).
You can create any size you want rooms with corridors! you also have prefabs that enable the creation of large podium.
The pack is tablet and mobile friendly! Just think to resize textures…
Flat textures are provided (also normal maps, and metal maps), if you want to personalize the kit for your needs. You just have to change the colors to personalize your own showroom!
Take a look on the :
★ Volume 1 ★
★ Volume 2 ★
★ Volume 3 ★
★ Volume 4 ★
★ Volume 5 ★
★ Volume 6 ★
★ Volume 7 ★
★ Volume 8 ★
★ Volume 9 ★
★ Volume 10 ★
★ Volume 11 ★
★ Volume 12 ★
Do not forget to read the readme file! no complicated building rules. Just duplicate/move the elements for your needs, and play!