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Anyone deal with checkerboard lighting at random?


I've been having a lot of fun learning unreal engine 4 but in every verision of it I've had strange issues with what I assume to be lighting on my own custom levels. The effect appears at random angles and creates a black, flickering checkerboard effect, similar to GPU Artifacts. However, other games and programs do not show this issue, even certain other levels, generally made by Epic. They are simply using the default settings, BSP and static meshes. There are no other volumes or effects to my knowledge other than default editor settings. I run an AMD HD 7900 series and an i7-2600k at default 3.4GHz settings. I've included a video at the bottom of the page.

Any assistance would be wonderful!

Thank you in advance for your time!

Video Here

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asked Jun 22 '14 at 03:00 AM in Rendering

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Hi TheChi -

It looks like it is an issue centering around the eye adaption post process settings. Either go into your Global Post Process volume or create an unbound post process volume, adjust the Auto Exposure settings to 0 and 0. See if you are still getting there error in your level.

Thank You

Eric Ketchum

I haven't heard from you in a few days so I am marking this as answered for tracking purposes, but if this problem has persisted or returns feel free to open it up again.

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answered Jun 24 '14 at 08:25 PM

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Lovecraft_K ♦♦ STAFF
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avatar image TheChi Jul 09 '14 at 11:46 PM

Hello, I'm not sure if this is the proper method to respond to this issue but attempting to resolve the issue did not work as intended. I created a post process volume, set it to unbound, and set the max and min brightness of auto exposure to zero. It only made the level blindly white and covered the artifacts. I will include a video at the bottom of this comment like last time.

My apologies for not responded sooner, work kept me away for some time.

Video Here

avatar image Lovecraft_K ♦♦ STAFF Jul 10 '14 at 02:56 PM

Hi The Chi -

You are correct and it is not a problem. Would you be able to send me the map file that is generating this issue for you? It does not look like you are using too many custom mesh assets in which case I would only need to know which sample you created this map from. Also could you upload a copy of your DXDiag and let us know exact what exact model video card you have (**here is an article which will tell you how to find the information**)

Thank You

Eric Ketchum

avatar image TheChi Jul 10 '14 at 07:45 PM

I used the FPS Blueprint Starter Template with the default starter content enabled. The map files and text data of both 32bit and 64bit DxDiag readouts have also been included in the link below.

Files here

avatar image Lovecraft_K ♦♦ STAFF Jul 11 '14 at 02:42 PM

Hi The Chi -

So I am still working on tracking down the exact cause but I would like you to please try and update your Video Card Drivers to the latest version (14.4) you are currently running (12.104)? Let me know if this happened to clear up the issue.

Thank You

Eric Ketchum

avatar image TheChi Jul 11 '14 at 06:28 PM

Just finished the update and I'm both delighted and embarrassed to say it seems a driver update was all that was necessary. I'll keep you posted but I tested both flying around in editor and as a character and the artifacts did not appear. I think it's safe to mark it as resolved for now.

Thanks again for your support and I hope you have a good day Eric!

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