Good afternoon, everyone.

This time, I hope I'm posting in the right thread.

I'm having a problem with copying particles using the effect method.
It might be a bug – those that start with "item_" followed by a large number are not being copied.
I manually add the missing ones in the Data folder, in the text files, and the effects appear in my particles, but they disappear again after the next load.
If you look in the Data folder, everything seems fine, but in the model window on the map, it's null again.
What's going on? Has anyone else encountered something similar?

And questions: how do I transfer a model without effects from a town (Hottabych says, "Select all particle properties with Shift, press Ctrl+C. Then, in the effect, create a new empty particle"), but how do you get to the effects folder from there? The elven tree still won't copy. And in general, how do you create your own effects?
Especially if the main model, which Hottabych calls the main one, is also an effect.

Maybe there's a guide on creating effects somewhere? I haven't come across one yet.
Otherwise, I'll bombard everyone with questions.