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    Originally posted by NiukNiuk View Post

    Yeah it's bugged in 4.22.3, see https://forums.unrealengine.com/unre...t-node-in-4-22
    It seems fixed in the current 4.23 beta build (preview 3)
    Oh god...you're right, I just tested it. Thanks for the link, I would never have figured that out on my own.

    How did such a massively game-breaking bug not get fixed after three updates...or even get released in the first place...I hope I can cherry-pick that fix commit into 4.22.3 because it's not feasible to upgrade at this point.

    Comment


      I'm in the same situation...I don't really know how to backport the fix to 4.22.3...so I'm waiting for Epic to wake up (I don't want to use a beta build for my current professional project)

      About gpulightmass: anybody knows how to use it in 4.23 preview?

      Comment


        Originally posted by DsyD View Post

        Has anyone been able to figure out problems like this where it seems like indirect lighting just doesn't work? Using 4.22.3 and running into this problem with no bounce-lighting on ceilings, on a purely indoor scene with just point and spot lights.
        Are you using Rect lights?

        Comment


          Originally posted by NiukNiuk View Post
          I'm in the same situation...I don't really know how to backport the fix to 4.22.3...so I'm waiting for Epic to wake up (I don't want to use a beta build for my current professional project)

          About gpulightmass: anybody knows how to use it in 4.23 preview?
          Fix is in 4.23, it's an issue with the material compiler. You're going probably to backport the fix to 4.22.3, it's what we did. If you're not a programmer, you should probably move to 4.23. I'll be very surprised if Epic find time to fix this in 4.22.3 (even if it's basically a copy/past, it's taking no more than 10min), generally they're moving forward and ask to people to update. It shouldn't be dangerous for your project since the big jump was 4.22 rendering wise.
          Lighting artist - Sumo Digital
          www.quentinpapleux.com

          Comment


            Originally posted by wickerman123 View Post

            Are you using Rect lights?
            I was, but I switched them out for spot lights to see if they were bugged with GPULM.

            I used git cherry-pick to merge the commit https://github.com/EpicGames/UnrealE...1ccb5575c6d40b into my 4.22.3 build and it seems to work. It looked like it was still broken at first, but it seemed to fix itself after I made some meaningless changes to my material instances and re-saved them. Maybe the material data is cached somewhere and not updated unless it's modified.

            Comment


              Originally posted by DsyD View Post

              I was, but I switched them out for spot lights to see if they were bugged with GPULM.

              I used git cherry-pick to merge the commit https://github.com/EpicGames/UnrealE...1ccb5575c6d40b into my 4.22.3 build and it seems to work. It looked like it was still broken at first, but it seemed to fix itself after I made some meaningless changes to my material instances and re-saved them. Maybe the material data is cached somewhere and not updated unless it's modified.
              AFAIK rect lights do not support more than one bounce of GI calculation with GPULightmass so I would recommend not using them.

              Comment


                Hello,

                I need some help with these light splotches that you can see on the images attached.

                I have already tryed to turn down the "FireflyClampingThreshold" from 10.000 to 100, with any difference at all in the results
                The light quality is set to "Production", and the gpu lightmass settings to extreme

                They only appear around the direct light that is comming trough the windows, the rest is clear without any light splotches...

                Thank you very much in advance!!

                Comment


                  Originally posted by Idgi_ View Post
                  Hello,

                  I need some help with these light splotches that you can see on the images attached.

                  I have already tryed to turn down the "FireflyClampingThreshold" from 10.000 to 100, with any difference at all in the results
                  The light quality is set to "Production", and the gpu lightmass settings to extreme

                  They only appear around the direct light that is comming trough the windows, the rest is clear without any light splotches...

                  Thank you very much in advance!!
                  Try Changing HDRI MAP.
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                  https://www.youtube.com/playlist?lis...X3Sm2Z9NXEHFV9

                  Comment


                    Hi
                    I have been using GPULightmass for quite some time and I have never had any problems, I am using Unreal 4.22.1 and the following message appeared after doing the build.

                    <None> === Lightmass crashed: ===Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xcf581000
                    Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xcf581000

                    0x00007ffefa36dab0 nvcuda.dll!UnknownFunction []
                    0x00007ffefa36dc8b nvcuda.dll!UnknownFunction []
                    0x00007ffefa459acf nvcuda.dll!UnknownFunction []
                    0x00007ffefa55e868 nvcuda.dll!UnknownFunction []
                    0x00007ffefa45a4ad nvcuda.dll!UnknownFunction []
                    0x00007ffefa32e7f4 nvcuda.dll!UnknownFunction []
                    0x00007ffefa333416 nvcuda.dll!UnknownFunction []
                    0x00007ffefa32bc4a nvcuda.dll!UnknownFunction []
                    0x00007ffefa4bea92 nvcuda.dll!UnknownFunction []
                    0x00007ffeac2bf535 GPULightmassKernel.dll!UnknownFunction []
                    0x00007ffeac2bedb0 GPULightmassKernel.dll!UnknownFunction []
                    0x00007ffeac2bff8a GPULightmassKernel.dll!UnknownFunction []
                    0x00007ffeac2b3b8c GPULightmassKernel.dll!UnknownFunction []
                    0x00007ffeac2b3b09 GPULightmassKernel.dll!UnknownFunction []
                    0x00007ffeac2b2c71 GPULightmassKernel.dll!UnknownFunction []
                    0x00007ffeac2cc7bf GPULightmassKernel.dll!UnknownFunction []
                    0x00007ff7f09d983f UnrealLightmass.exe!UnknownFunction []
                    0x00007ff7f0a46ab6 UnrealLightmass.exe!UnknownFunction []
                    0x00007ff7f0a16ec0 UnrealLightmass.exe!UnknownFunction []
                    0x00007ff7f09cbb64 UnrealLightmass.exe!UnknownFunction []
                    0x00007ff7f09ef36d UnrealLightmass.exe!UnknownFunction []
                    0x00007ff7f0a0e4da UnrealLightmass.exe!UnknownFunction []
                    0x00007ff7f0a81bb8 UnrealLightmass.exe!UnknownFunction []
                    0x00007fff31fe7e94 KERNEL32.DLL!UnknownFunction []
                    0x00007fff34ad7ad1 ntdll.dll!UnknownFunction []

                    I don't know what's going on, if someone could guide me to know why this is, I'd really appreciate it

                    Comment


                      Originally posted by trebol View Post
                      Hi
                      I have been using GPULightmass for quite some time and I have never had any problems, I am using Unreal 4.22.1 and the following message appeared after doing the build.

                      <None> === Lightmass crashed: ===Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xcf581000
                      Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xcf581000

                      0x00007ffefa36dab0 nvcuda.dll!UnknownFunction []
                      0x00007ffefa36dc8b nvcuda.dll!UnknownFunction []
                      0x00007ffefa459acf nvcuda.dll!UnknownFunction []
                      0x00007ffefa55e868 nvcuda.dll!UnknownFunction []
                      0x00007ffefa45a4ad nvcuda.dll!UnknownFunction []
                      0x00007ffefa32e7f4 nvcuda.dll!UnknownFunction []
                      0x00007ffefa333416 nvcuda.dll!UnknownFunction []
                      0x00007ffefa32bc4a nvcuda.dll!UnknownFunction []
                      0x00007ffefa4bea92 nvcuda.dll!UnknownFunction []
                      0x00007ffeac2bf535 GPULightmassKernel.dll!UnknownFunction []
                      0x00007ffeac2bedb0 GPULightmassKernel.dll!UnknownFunction []
                      0x00007ffeac2bff8a GPULightmassKernel.dll!UnknownFunction []
                      0x00007ffeac2b3b8c GPULightmassKernel.dll!UnknownFunction []
                      0x00007ffeac2b3b09 GPULightmassKernel.dll!UnknownFunction []
                      0x00007ffeac2b2c71 GPULightmassKernel.dll!UnknownFunction []
                      0x00007ffeac2cc7bf GPULightmassKernel.dll!UnknownFunction []
                      0x00007ff7f09d983f UnrealLightmass.exe!UnknownFunction []
                      0x00007ff7f0a46ab6 UnrealLightmass.exe!UnknownFunction []
                      0x00007ff7f0a16ec0 UnrealLightmass.exe!UnknownFunction []
                      0x00007ff7f09cbb64 UnrealLightmass.exe!UnknownFunction []
                      0x00007ff7f09ef36d UnrealLightmass.exe!UnknownFunction []
                      0x00007ff7f0a0e4da UnrealLightmass.exe!UnknownFunction []
                      0x00007ff7f0a81bb8 UnrealLightmass.exe!UnknownFunction []
                      0x00007fff31fe7e94 KERNEL32.DLL!UnknownFunction []
                      0x00007fff34ad7ad1 ntdll.dll!UnknownFunction []

                      I don't know what's going on, if someone could guide me to know why this is, I'd really appreciate it
                      There is not enough memory to build the lights, try reducing some lightmap resolution that might be eating lots of resources

                      Comment


                        Originally posted by Andres H RG View Post

                        There is not enough memory to build the lights, try reducing some lightmap resolution that might be eating lots of resources
                        thanks for the explanation

                        Comment


                          Anybody here knows how to make it work with 4.23 preview? Thanks!

                          Comment


                            For some reason after a few blocks it just slows down dramatically to a crawl, not sure why? Last build took 5 hours, same settings now (added some new stuff, nothing crazy) would take longer than a week to finish.

                            It's ticking up 1 number every few seconds. 38/255
                            Attached Files
                            Last edited by Megaham; 08-01-2019, 01:30 PM.

                            Comment


                              Do you have details on your hardware specs? I mean it could take hours and days if you have a really under powered video card. Or if you're using a laptop, it's throttling the GPU due to heat.
                              Originally posted by Megaham View Post
                              For some reason after a few blocks it just slows down dramatically to a crawl, not sure why? Last build took 5 hours, same settings now (added some new stuff, nothing crazy) would take longer than a week to finish.

                              It's ticking up 1 number every few seconds. 38/255

                              Comment


                                Originally posted by NiukNiuk View Post
                                Anybody here knows how to make it work with 4.23 preview? Thanks!
                                Nope, and GPULightmass is no longer supported :/ So, I am sure we'll be stuck with 4.22 until RTX Lightmass will be officially released

                                Comment

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