Get it from the assets store here
Duplicator is a set of duplication tools for unity 3d, that you could easily use inside the editor.
-you can generate brick walls with your own brick 3d model using the generate wall
-you can duplicate (multiple objects) on a surface using the mesh image duplicator tool
-you can randomize your 3d objects using the Randomizer tool
– you can create 3D grids with separation using Create 3D grid tool
– you can create 2D grids with separation with Create 2D grid tool
– you can duplicate multiple objects with different parameters using the duplicate special tool
-you can duplicate (multiple objects) on a flat grid using the image duplicator tool
-you can reduce the amount of objects you have using the Reduce tool either by hiding or destroying the objects
From a Gamer to a Gamer 
Does this work at runtime? could be great for dynamically adding or removing objects from a scene!!!
Cheers,
Oliver
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Hello Oliver,
This tool is not meant to be used in runtime, i created it to help game designers populate a level with ease, you can modify the code to run in runtime if you wish, but it’s not recommended because in most cases it creates an overhead
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