LPV not working in 4.4.1

Development Programming & Scripting
1

LPV does not seem to be working in 4.4.1. I added the command line r.LightPropagationVolume=1 in ConsoleVariables and that caused the engine to crash as soon as it starts up. The program goes through its loading phase, then before it launches I just get the Unreal Engine Crash Reporter window.

I went back and got 4.3.1 to try there and, while I haven’t tested out how well LPV works in there yet, the engine started just fine with r.LightPropagationVolume=1.

Is this a known issue or is there a workaround?

2

Hi Joe1029,

Does this occur on a clean project with no additional content?

3

Hi ,

I just tested it out in a new project with only starter content and a new project with no starter content, as well as a few demos from Epic. Every one of them crashes before the editor opens.

4

The variable you added, did you add this in the .ini file for console variables? If so does removing it stop the crashes?

5

Hi ,

I attempted adding r.lightpropagationvolume=1 to my consolevariable.ini file and did not crash or get any errors upon using it in the editor. Are you on the github or the binary (launcher) build?

6

Yes, I added r.LightPropagationVolume=1 to ConsoleVariables in C:\Program Files\Unreal Engine\4.4\Engine\Config.
The line looked like this;

; [Startup]
; FogDensity = 0.9
; ImageGrain = 0.5
; FreezeAtPosition = 2819.5520 416.2633 75.1500 65378 -25879 0

[Startup]
r.LightPropagationVolume=1
; Uncomment to get detailed logs on shader compiles and the opportunity to retry on errors
;r.ShaderDevelopmentMode=1
; Uncomment to dump shaders in the Saved folder
;r.DumpShaderDebugInfo=1

and yes, taking that line out everything went back to normal.

7

Sorry those lines didn’t stay stacked, I didn’t expect that.

8

Hi ,

I’ve figured it out, sorry to take up your time. But it turns out I was just missing a ; before the command. The site I found this on didn’t use one, and it worked without one in 4.3, so it hadn’t even dawned on me to try until just now. Have not tested LPV in the project yet, but the project launched without a hitch and the settings for LPV are there. Thanks for all your help.