Video: https://www.youtube.com/watch?v=prOWgq1mo0k

This Blueprint generates meshes in a row with randomized scale and angle("books on a shelf" way). Perfect way to populate thousands of books on bookshelves. It comes with a set of 16 low poly book models, but you can import your own meshes for distribution. You can control number of instances, size threshold and additional arrangement like angle and stack. Meshes are generated in a natural way and for huge amount of instances you will not see the repetition. All instances are placed with precision as every single mesh is checked seperately for colliders.