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I have a bookshelf modeled and a group of 10 books (so as to not make the bookshelf look repeated), is it possible to create a driver to just drag up/down the amount of books on the shelf???

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You could use particle system to emit the books from vertices:

enter image description here

The emitter is a subdivided plane, the origin of the book group (only 3 books on layer 2) is set to the bottom of the book.

Demofile: http://pasteall.org/blend/29436

Particle settings:

Uncheck Random under 'Emit from:'

enter image description here

Related: Prevent particles at the same place?

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  • $\begingroup$ I see some books stacking on top of each other. How can I solve this? $\endgroup$ Commented May 25, 2014 at 11:37
  • $\begingroup$ @WorldSEnder I guess you emitted more particles than there're vertices to emit from. Either subdivide the emitter a bit more or reduce the number of particles. $\endgroup$
    – stacker
    Commented May 25, 2014 at 17:17
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    $\begingroup$ @WorldSEnder Sorry I didn't notice that I posted it with checked Random. Uncheck Random under 'Emit from:' $\endgroup$
    – stacker
    Commented May 25, 2014 at 18:34

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