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Light looks randomly different in level streaming in packaged project.

Hi, I've encountered weird problem with light in my project.

All levels in project are loaded by streaming with usage of level instancing. In few levels static light looks different in editor and packaded project. More interesting thing is that in package game light difference is random.

Any idea what can cause this issue?

PiE: alt text Stand alone 1: alt text Stand alone 2: alt text

Product Version: UE 4.13
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pie.jpg (76.4 kB)
stand2.jpg (57.8 kB)
stand1.jpg (39.8 kB)
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asked Sep 29 '16 at 01:19 PM in Rendering

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nawega88
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avatar image noatom Oct 01 '16 at 03:46 AM

I'm having the exact same problem and it's driving me insane. A level by itself looks good, when I add it into a parent level(that is ALL empty), for some reason, when I hit play it looks different!

avatar image nawega88 Oct 01 '16 at 07:32 AM

Found workaround for this problem. I've changed lights from static to stationary and disassemble casting dynamic shadows. Lights are bit heavier than static, but at list everything looks like I want.

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Hi Nawega,

After testing in your particular test build I was able to determine that the issue was related to how your room was rotated (in particular room 4). There may be other factors that could be causing the issue but I don't think this is an issue with the engine. If you still believe that it is a bug with the engine, I will need steps on how to reproduce the issue in a blank project with minimal assets needed for the issue.

Thank you for your time,

Ed

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answered Oct 11 '16 at 04:03 PM

avatar image nawega88 Oct 12 '16 at 09:38 AM

I've prepared new test, I'm sending it to you right now. Your right about level rotation, each time level reach rotation -180 light error occurs.

avatar image Ed Burgess ♦♦ STAFF Oct 12 '16 at 05:52 PM

I went ahead and created a bug report for the developers to review. I'm not entirely sure this is a bug, but this will ensure this issue is at least looked at. You can find the report here: https://issues.unrealengine.com/issue/UE-37222

avatar image Ekoomedia Sep 12 '18 at 11:18 PM

Problem still in UE4.20

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