Crash when rendering particle system with cast shadow

anonymous_user_89f0aa1e · September 11, 2015, 6:12pm

Hi,
since UE 4.9 our level is crashing.

I narrowed it down to be a particle system that is casting a shadow. It only crashes when checking “Cast Shadow” under the Lighting Properties.

Is there somewhere I can send the particle system to?

Steps:

Add the particle system to the level (drag and drop from content browser into level)
Set the checkbox “Cast Shadow” of the created particle system to true (Cast Shadow)
It either crashes directly or one has to enter the game (pie or standalone) which should results in a crash.

Besties,

anonymous_user_6e7b421a · September 14, 2015, 3:52pm

Hey ,

In order to assist you with this issue I am going to need a bit more information. Would you mind taking a look at our How to Report a Bug sticky post on the Forums?

It will give you all the correct instructions on how to make an official bug report on the AnswerHub including all the information we will need in order to move forward with the reporting/troubleshooting process.

Let me know if you have any other questions and I will be glad to assist you.

Thank you,

anonymous_user_89f0aa1e · September 19, 2015, 9:40am

Branch: Source from Github
Build Version: 4.9.0

I was able to produce this crash on a blank c++ project. Simply added the particle and enabled the shadow.

System spec:
MacBook Pro (Retina, 15-inch, Late 2013)
Model Name: MacBook Pro
Model Identifier: MacBookPro11,3
Processor Name: Intel Core i7
Processor Speed: 2,3 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Boot ROM Version: MBP112.0138.B15
SMC Version (system): 2.19f12
Graphics:
NVIDIA GeForce GT 750M 2048 MB
Memory:
16 GB 1600 MHz DDR3
OS:
OSX Yosemite 10.10.5

Call stack:

Editor Log:

Please tell me whether this is enough information or not. Also, I suppose one needs the specific particle effect to reproduce this. Hence, please let me know to whom I can send it.

anonymous_user_6e7b421a · September 22, 2015, 2:30pm

Hey ,

Thank you for the requested information. As you said, I would need the particle effect to test this issue accurately, unless there is a particle system within the ‘Starter Content’ that also causes this crash to occur.

Would you mind testing this issue in 4.9.1 to verify it occurs in this build as well? If you have any other questions or need additional assistance please let me know.

Thank you,

anonymous_user_89f0aa1e · September 22, 2015, 4:14pm

Thanks for your answer, .

Where can I send the particle system to? Or share a dropbox/google drive folder for that matter?

By the way, the crash is still occurring on version 4.9.1 .

anonymous_user_6e7b421a · September 22, 2015, 6:34pm

Hey,

I did see your most recent post, but tried to delete one of your comments as it was a duplicate and it deleted both of the posts.

Anyway, if you would like to share the particle system issue you are experiencing issues with, you can zip the blank C++ project into a folder and upload it to a google drive or dropbox, and provide me with the link via private message on the forums.

In order to properly zip the project and have the issue appear on my end, make sure you have zipped the Content, Config, Source, and Uproject files into the folder. Let me know once you have sent me the private message so we can go from there.

Thank you,

anonymous_user_89f0aa1e · September 28, 2015, 4:10pm

I’ve received an email about an update on this topic but nothing changed…

Did you receive my submission to your forum account concerning the particle bug?

anonymous_user_6e7b421a · September 28, 2015, 8:35pm

I did receive your project, and unfortunately did not receive the crash you are reporting. I am actually using a similar system to yours, including the Nvidia 750M graphics card.

Is there anything in your code that could be affecting or causing this issue?

anonymous_user_89f0aa1e · September 28, 2015, 9:09pm

Well, I’m using the project that I sent you. Other than that I’m using the 4.9.1 source code from github (no edits).
I will ask a team member of mine whether he experiences the crash as well.

I’ll get back to you with the result.

anonymous_user_89f0aa1e · September 28, 2015, 9:14pm

He doesn’t experience the crash either.

An anomaly : ).

But I just tested, it still happens for me.

anonymous_user_6e7b421a · September 28, 2015, 9:14pm

Would you mind testing this issue in the Binary version as well? There could be something that happened when generating the project files or building the engine that caused this to happen.

anonymous_user_89f0aa1e · September 29, 2015, 1:24am

Well indeed. It does not crash in the binary version (Started 4.9.1 from Epic Launcher and migrated the particle system over to the newly created blueprint blank project).