How do I sprite destruction in C3?

In C2 using tilemaps of 1x1 pixel size + physics + shadowcaster i was able to do this:

https://i.imgur.com/4fVcTRj.gif

But now in C3 is not possible due even with one tilemap with a small block size already gets 100% of CPU when you move the player around.

So, how get that sprite destruction with physics + shadowcaster without the tilemap trick?

Post your project file so people can see what you have done. This is impossible to analyse without it.

But the Tilemap method not works on C3 due low perfomance, im looking a new way to get pixel destruction in C3 that allows physics and shadowcaster.

Btw, this is the method used using the tilemap 1x1 trick, but as ashley said in other post the seamless off mode which does the trick in this case has been cut from C3 features, so looking other way to achieve the same.

drive.google.com/file/d/1sU6xnx0bXecI6F7DEkKu_GsKgVExk7v7/view

Ok I understand the performance difference now using the erase tile action. I'll play with it in my spare time and see if I can come up with anything