'Painting' objects into a game scene

Hey all. I'm currently using ProBuilder and ProGrids for generating a game world based on cubes (a la Minecraft or the such). I was wondering if there are any easy ways to basically 'paint' objects based on one selected. Right now, I'm having to use Ctrl-D (duplicate) a chosen object over and over; being able to pick an object then choose a vector arrow and drag in a certain direction to make new copies of that object would be really convenient. If not possible with the ProCore tools, I'd be open to hearing about any other plugins which allow for this. Thanks for your time!

 

This might be useful for you:
https://github.com/AlexanderAmeye/FreePrefabPainter
It's very simple and straightforward, and you could easily extend it with the functionality you need, like drawing onto grids or whatever.

There are a few prefab painter assets in the store, too.