I got client who has weird room, ceiling height only 2 m at the highest point and 1.54m at the lowest point, and he want to fill it with bookcase, so here you are.......
I started it this morning, 10am, 11am got break for 2h, then finish it at 4pm.
no glass, no reflective things, so it only take 2 minutes to render, 18 minutes for finishing render (presentation preset).