Instanced Static Meshes vs Multiple Static Meshes when in need to update Instances

[Schmutzfleck]

Hi,

I’m creating a 3D grid building system (kind of SIMS like but in 3 dimensions for better understanding). I only place cubes in my Grid. I need to place around 8k Cubes in my 8k grid “cells” . Should be obvious that I use ISMs. But then I want the user to be able to remove specific cubes by selecting grid coordinates. For that process I need to iterate through all instances and check the transform properties which isn’t efficient either.

Is there an obvious solution I’m too blind to see or do I have to choose between many draw calls and the iteration? Any recommendations?

Thanks guys!
Schmutzfleck

[ClockworkOcean]

I think you can use a trace to instantly find the right one

500×500 2.84 KB

Hi Michael, When you break the Hit Result around 1:52, you can see there’s something called Hit Item. For InstancedStaticMeshes that returns the index of the instance that was hit. That should be much easier than trying to find it based on the transform! Version 4.9 adds some more blueprint functionality to allow you to find instances overlapping spheres, and also to allow you to blueprint the component class used by the foliage tool. Cheers

[Schmutzfleck]

Yeah thanks. I could eventually set a trace inside the specified grid cell. So I’ll just hit the specific cube I need and get its index. That’s kind of an interesting workaround. Didn’t think about that.