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UE4 Editor/Windows crash after setting box simplified collision on very thin (1 unit) mesh


I have crash when creating collision mesh on very thin box, like a plate for example. I created simple mesh in editor for testing functions only, and generating collision always crashing editor and freezes Windows. I have Windows 10 updated and I never have crashes for other reasons.

Also, I never had before problems with creating simple collisions with other mesh dimensions. I think it happens because this mesh is 1 unit flat.

alt text

Steps to Reproduce:

Open level the editor

  1. create box brush 30x30x1

  2. create static mesh from this brush, save, open

  3. try to add box simplified collision

Result: after some % editor and system is frozen.

Expected: should create box simplified collision

Product Version: UE 4.15
collision_crash.png (370.2 kB)
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asked Apr 10 '17 at 12:06 PM in Bug Reports

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Hi Vaheva,

I attempted to reproduce this on two separate PCs in-house, but so far I haven't been able to get your results. The collision is created within a second or two and I can use it in-game without issue.

I'm wondering if this could be hardware/driver related. Here is the recommended specs for the engine. If you are confident that you should be able to run the editor without issue, could you post your Dxdiag (system specs) and we can look into it further?

  • Windows: Go to the Start menu and type ‘dxdiag’ into the search bar. Open the file and then click ‘Save All Information’. Post that text file here.

  • Mac: Go to the Apple menu and click ‘About This Mac’.

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answered Apr 11 '17 at 07:03 PM

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avatar image Vaheva Apr 11 '17 at 07:12 PM

here dxdiag. No issues. This crash is no problem for me, I not need meshes like this, it was only fast create plate. I'm using this computer for coding only - is low spec, but no other problems like this.


link text

dxdiag.txt (74.4 kB)
avatar image TJ V ♦♦ STAFF Apr 11 '17 at 07:48 PM

Okay, it's good to know this can happen and since you posted your dxdiag other users will be able to compare if they get the issue as well. I'm glad it's not a show stopper for you though.

If you are interested, you could try updating your graphics card driver. That may help. Other than that, upgrading RAM would be the other thing.

But since it's most a coding PC for you, I'm going to resolve this post for now and keep an eye out for any other reports of this.



avatar image Vaheva Apr 11 '17 at 07:57 PM

Thank you, this is no big deal for me, just it happens twice in a row, so I posted as "bug" worth to check. I'm working now only on coding with simple object replacements, I will upgrade my pc for sure for design stage. Maybe you will more interested in this https://answers.unrealengine.com/questions/586789/removing-brush-faces-issue-rendering-bug.html or for me, later will be very important this: https://answers.unrealengine.com/questions/560906/depth-of-field-and-emitters.html it can be my crap gpu issue :P I can't change category to bug reports, but it looks like. Thank you again, Pawel

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