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4.3 and Light propagation volumes

Since version 4.3 (preview), use the volume Light propagation system crashes the software. To reuse the Unreal Engine, you have to restart the system. As in the tutorial and earlier versions, the command line "r.LightPropagationVolume = 1" was added to the file ConsoleVariables.ini

Do you have a solution to fix this problem, please?

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asked Jul 09 '14 at 10:41 PM in Bug Reports

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Shinje
89 5 10 16

avatar image Raziєl Jul 10 '14 at 01:19 AM

Same Problem here.

avatar image Shinje Jul 10 '14 at 02:16 PM

Actually I am using a trick to "simulate" the lights inside buildings, the result is pretty good, but the result in GI was better, in 4.2. It's a shame to swap a light system against a tree system. Because we need both of them.

avatar image Lovecraft_K ♦♦ STAFF Jul 10 '14 at 05:57 PM

Hi Shinje

Thank you for your report. I will begin investigation into this issue as soon as possible. To begin with I want to gather a little bit more information from you. Did you use an existing project to crash or have you tried a sample project? Can you be as detailed as you can about the steps you took to go from launch engine to crash?

In the meantime, please be sure to review our suggestions for how to report a bug, and feel free to edit your post if you have additional information to provide: **https://answers.unrealengine.com/questions/12363/how-do-i-report-a-bug.html**

Thank you.

Eric Ketchum

avatar image iniside Jul 10 '14 at 06:00 PM

Hey I actually reported that issue quite a while ago: https://answers.unrealengine.com/questions/63147/enabling-light-propagation-volumes-on-directional.html

And one of users provided solution how to fix it and also pull request on github.

avatar image Shinje Jul 10 '14 at 07:09 PM

As I wrote in your subject, it doesn't work.

avatar image iniside Jul 10 '14 at 07:27 PM

Did you recompiled engine from source and edited shader files ?

avatar image Raziєl Jul 10 '14 at 07:30 PM

Your Solution already applyed on 4.3 branch. I Cheked yesterday.

avatar image iniside Jul 10 '14 at 07:53 PM

I just checked github source on 4.3 branch and it still not appiled to it ;)

avatar image Raziєl Jul 10 '14 at 07:57 PM

More we need to claim that. If 4.3 release comes with this bug, i cant go on with my work.

avatar image Shinje Jul 10 '14 at 08:20 PM

@iniside:Yes, i recompiled both of them.

@reneberwanger: Actually you can work without GI, and, later, you will use it again. When it'll work.

avatar image Raziєl Jul 10 '14 at 08:21 PM

I cant continue with my work without GI. The next step is GI + Speed tree. I need GI on 4.3 release.

avatar image Shinje Jul 10 '14 at 08:24 PM

The same but I try without.

avatar image Shinje Jul 10 '14 at 08:31 PM

The same again. I created a light system to remplace GI but the result is not perfect.

avatar image Raziєl Jul 10 '14 at 06:03 PM

For me, I tryed both, my own project and a 3th person shooter BP template. In both cases, IF r.LightPropagationVolume = 1 when try to add a Directional Light Movable on viewport, the system freezes, and only with hard reset to resolve.

The steps are on my tests are:

1 - put r.LightPropagationVolume = 1 on ConsoleVariables.ini

2 - Open any template.

3 - Delete All lights from scene, skydome or atmospheric fog

4 - add a Directional Light Movable on scene

5 - System Crash

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2 answers: sort voted first

This bug has been fixed in main, and is being considered for a 4.3 hotfix. The code changes have been posted in the other thread if you want to try them out yourself.

https://answers.unrealengine.com/questions/63147/enabling-light-propagation-volumes-on-directional.html

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answered Jul 14 '14 at 05:59 PM

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DanielW STAFF
1.9k 31 11 72

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Hi Shinje -

Thank you for your help this is most definitely a bug. I have logged it with our engineers and I will keep you appraised as we work on this issue.

Thank You

Eric Ketchum

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answered Jul 10 '14 at 09:01 PM

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Lovecraft_K ♦♦ STAFF
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avatar image Shinje Jul 10 '14 at 09:33 PM

Thanks to you, Eric

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