Adds a procedural Bookshelf to the scene
-Click the Add Asset button to add the object to the scene.
-Go to the modifiers tab to access the parameters.
Shelves: Amount of shelves
Books per row: Amount of books per row
Shelf Margin: Distance between shelves
Shelf Thickness: Boards thickness
Sides: Adds/removes the sides
Top Margin: When sides are active controls the margin on the top
Bottom Margin: When sides are active controls the margin on the bottom
Seed: Generates different order for the books
Animate: Controls flying books animation
Anim Ratio: The amount of books that get animated
Material: The material for the shelves (procedural generic wood by default)
Max Collection Size: The maximum amount of books in collections
Order Ratio: A ratio for the order in the books of the bookshelf