How to build a world filled with blocks like terraria in top-view game?

I’m making a top-view game that happens in a cave and filled with blocks and ore.
Now,I’m tring to generate abundant blocks in the game.Just like this:


Initially,I tried to use tilemap to acheive this function.But the tilemap seems to disable to be edit in buleprint.That means players can not interact with the blocks in the tilemap.It just can be applied the appearance that i prepared.
Then,i tried to use actor to acheive my order.A block is a actor,and now it can be interacted by players like distory and put,but there was 3600 actors in the game concurrently!!My computer is so slow when the game is working.
So how to acheive this function perfectly?I need help!

There is a sample project, either built into the engine or available as a download from epic, that features a generated grid world like the one you are trying to make. Look for a project with “grid” in the title in the unreal sample projects, I will look for it’s exact name when I get home.

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Thanks!!

well,i didn’t find the program with “grid” in the title that you said in Unreal Engine Shop.Can you tell me the accurate title?

Excuse me?Can you tell me the accurate name of the Project?Thanks!

please,I need for help! T T

Check out the samples in the Epic Launcher, the one called Turn Based Strategy.