The model is made for anti-aliasing, the stack is not collapsed.
Anti-aliasing modifier enabled (on render iterations 1,2)

Polys - 292,371
Verts - 392,307

The set includes three bookshelves with decorative filling, including:
1. Vases
2. Candlestick
3. Box
4. Candles
5. Books
6. Dill branches
7. Photo frames
8. Box
9. Perfumed oil
10. Tray
For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.