Prop collision doesnt work when i'm moving it (Player goes through the prop)

Hi guys,

I’m struggling for 3 days on this issue, i’m trying to do a simple thing but it seems the game doesnt let me do it

I just want to create a “crushing” wall like in action movies on a specific area of my map

For example : the player is in a room, after a specific timer timeout, like in my image, basic wall movement from the edges of the arena, to the center

The problem is simple : when i move my custom meshe (box created in modeling tool) it literally goes through my player character

If i try to run to go through the wall, the collision works

If i stand still, the prop is literally going through my character and thats the problem, my player can literally avoid the whole gameplay logic by standing still and thats something i dont want

I dont want to add an elemination volume wrapped on my wall to create a “death wall” gameplay

I tried absolutely everything i know : Moving prop device, Sequencer, verse Move.To, Scene Graph prefabs, tested lots of collision presets, asked on discord

I dont understand how people are doing floor is lava, with the lava prop rising, because even the lava prop is going through players when the player is in idle stance

If you have any idea or workaround, i’ll anything at this point

Thanks guys !

Hey @cobuura how are you?

I’ve been testing this and I found that you should be able to do that Crushing Walls room by using only prop mover devices. You don’t need to edit or config any physics nor collisions on your props, as you can manage their collisions behavior directly on your prop mover device’s settings.

Let me show you how I did it and how it looks from my side:

  1. You only need to create your custom prop and choose its mesh:

  2. Drop your custom prop on your Island and place a Prop Mover device near it:

  3. I’m using this settings on my Prop Mover:


And that’s it! It should work without any issues, no matter if the players are moving or not, as you can see in the next two videos:

  1. Using a Fortnite premade Prop:

  2. Using a custom Prop:

In both cases, the prop pushed the player without any issues.

Please, check this method and let me know if it works!

If it doesn’t work for you, please share your prop’s settings and a detailed explanation about how you are trying to do it, so I can analyze it better!

1 Like

Thanks for your answer, i follow your tutorial, i have now 1 issue

When i place my prop at (X=-44702.540230,Y=164251.948066,Z=15195.631877) (my hub where players spawn, i placed it for testing purpose) the collision does work :

But when i put my prop at (X=-14138.140731,Y=127156.147946,Z=3597.747979) lower than the previous video and this locaiton is where my prop is supposed to be in real game scenario

The collision does half the work, i dont go through the prop like a ghost, but i get stuck midway :

Blueprint detail / Prop detail / Prop mover detail

Its strange really, i dont see any possible explanation to this

Hello again @cobuura how are you?

It is really weird! As I can see, the wall isn’t pushing you smoothly even when it works.

Sadly, I wasn’t able to reproduce the issue, but could you show me your Blueprint?

Please, open it and show me which components you added to it, and the collision presets you set for your “Static Mesh Component”. So I can check if the problem is somewhere in there.

I’ll be waiting!

Thanks again for you answer, i hope you are doing okay too, i’m fine even though my mind is going crazy over this thing

Its literally the last thing i need to fix, to publish my map

And this is the base static mesh :

Thanks again for your help mate

Hey there!

Ok, I only found one more thing to test and I ran out of ideas after that :confused:

As I can see, you created that Blueprint as a “Building Prop”

Have you tried to create it as a “Building Static Mesh” instead?

Maybe it is having a replication issue, but I’m not sure, as everything I try on my Island works without any issues.

In addition to that I have a last question: have you tested it with a premade frotnite prop/wall? Did it worked or have the same issue?

Hope this is the key! Please let me know!

I tested with this prop and it doesnt work

But i tested in a another map and the exact same prop and it does work exactly like in your example
Even when the prop wall is in the air it correctly put the collision

I feel my main world is cursed, do you think it can be tied to world partition or spatial or anything else ?

I rebuild hlod, checked on and off "is Spatially loaded” nothing changes

Hello again!

Yesterday I was working on another problem with UEFN and started having issues with devices that were outside the Level Bounds. My last suggestion, given that you previously mentioned different heights, is to check that the place where you are using that wall is within the Level Bounds.

You can find the Level Bounds by looking for it in the outliner!

If this is not the problem, it is most likely a bug, which should be reported in the appropriate section. I am very sorry. :confused: