Originally posted by Zep Tepi:

Are they really random pieces or are they the same ones every time?

That border explanation above sounds about right.

Same ones but not in a predictable pattern. Sometimes it triggers, other times not. There is too broad of an occurrence rate to detect any noticeable pattern. Hence, Random-seeming.

My guess is that there is more than 1 variable acting, which create the popcorn effect only under certain outputs.

Originally posted by vinyblaster:

I have this torch and sign that just breaks. I would go on an adventure and come back, or just log into the game and I would find the materials (copper, wood and coal) just there on the floor. The torch and the sign, placed next to each other, just decided to self destruct while I was away.

Interesting. Thanks for the datum!

Now that you mention it, I did find an item stand with a piece of bread broken in another part of my build once. I rebuilt it, replaced the bread on the table, and it has not popcorned since (hope i didn't just jinx it! haha)

Here are a few screenshots to consider:

I show 3 blocks that popcorn on my current build.
Popcorn Block 1 & 2 are "Stone Block 1 x 2" pieces, and the Popcorn Block 3 is "Stone Arch".
https://steamcommunity.com/sharedfiles/filedetails/?id=2945669227
https://steamcommunity.com/sharedfiles/filedetails/?id=2945669012

You can see that 1 & 2 are not above the boundary, but block 3 is.

https://steamcommunity.com/sharedfiles/filedetails/?id=2945668820

If it was the boundary, then why are blocks 1 & 2 popcorning and not the blocks above, or next to the boundary?

I have the exact mini-tower built on the other side of the gate, just a little further from the boundary, but also not over the boundary, and the blocks in the same position do not popcorn.

Thoughts?