Hope this isn't hard...

[MrMessyHair]

Hello, hope you have a good day. How to spawn dust when the player has landed from a specific height? like -50*FRACUNIT for example

 

[CloneFighter]

You can't really do it based on height, but you can easily check for their downward momentum.
In pseudo-code, it would sound a bit like this:

Hook PlayerThink, with player:

• Check if player meets the conditions to be affected by our changes (playing as the right character, etc.)
• If not defined yet, define a variable to store player's "previous" Z momentum for comparison. Say... player.prevmomZ. We'll need it.
• If player has landed (here's one way to check that), and player.prevmomZ (IMPORTANT: account for flipped gravity here!) is less than, say, -16*FRACUNIT...
  • ...then spawn dust particles around the player (multiple ways here, but I'd use this one).
• Update player.prevmomZ for the next tic.

End hook.

 

[MrMessyHair]

Thanks bro