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    UPDATE!

    We have just released Preview 4 for 4.20! Thank you for your continued help in testing the 4.20 build before its official release. As a reminder, the Preview builds are for testing only, and should not be used for the active development of your project.

    For a list of known issues affecting this latest preview, please follow the links provided on the first post in this thread.


    Fixed in Preview 4
    Fixed! UE-59810 SkelMeshMerge not working for meshes with >1 LOD
    Fixed! UE-44910 Skeletons don't cook in a deterministic way
    Fixed! UE-60856 Pose Asset crash - update source crash when curve is added
    Fixed! UE-60561 Nothing in timeline for Blending_ControlRig sequence
    Fixed! UE-60486 Project fails to reopen after adding a feature pack
    Fixed! UE-60902 nDisplay icons are not set
    Fixed! UE-60870 Once Autoplay has been disabled, it cannot be re-enabled
    Fixed! UE-60867 Black squares on ActionRPG landscape on device
    Fixed! UE-60758 ActionRPG has outdated UE branding for app icon for Windows
    Fixed! UE-60746 Update RemoteSessionApp project to have Simple VirtualCamera sample level
    Fixed! UE-60677 Character can be instantly reoriented during some animations
    Fixed! UE-60674 iOS has the wrong Launch Image in ActionRPG
    Fixed! UE-60675 ActionRPG Android defaults to Vulkan
    Fixed! UE-60671 Background is black on devices because fog is not rendering
    Fixed! UE-60672 Pillar pops in vision when crossing middle of map
    Fixed! UE-60634 ARPG - Android Launch Image
    Fixed! UE-60633 ARPG - Blur backups on es3.1
    Fixed! UE-60577 Landscape in ActionRPG is default material in Mobile PIE (ES2)
    Fixed! UE-60558 VehicleGame launcher sample is missing some default inputs
    Fixed! UE-59041 Late feature : MDL/AXF importer
    Fixed! UE-59798 Late feature : AJA Media
    Fixed! UE-59438 Late feature : Virtual Set sample
    Fixed! UE-60898 AjaMedia.uplugin has EngineVersion set
    Fixed! UE-60772 Transparency and fading do not work in MeshEditor
    Fixed! UE-60723 Import CAD - Crash on re-import after deleting & undo deleting light source
    Fixed! UE-60803 Datasmith - Generate lightmap UVs is disabled at import
    Fixed! UE-54417 [CrashReport] UE4Editor_CoreUObject!StaticAllocateObject() [uobjectglobals.cpp:2305]
    Fixed! UE-60438 When Client Side Navigation is enabled, it is only initialized Server Side
    Fixed! UE-59055 Crash occurs when interacting with pop out widget for Debug Filter drop down within the Blueprint editor
    Fixed! UE-60254 Rare crash closing the editor after packaging with Nativization enabled
    Fixed! UE-60794 Editor crashes when accepting target in Merge Tool
    Fixed! UE-60774 Crash opening new level with current level and sublevel blueprints open
    Fixed! UE-60759 Crash diffing two blueprint and reloading one of them
    Fixed! UE-60661 Match3 fails to package with Nativization for Android, 'Function does not have a parameter named 'MoveType''
    Fixed! UE-60873 Crash compiling an Anim Blueprint used in as a Sub Anim Instance twice after changing a variable to Text
    Fixed! UE-60872 Crash compiling an Anim Blueprint used in as a Sub Anim Instance twice after changing a variable to String
    Fixed! UE-60878 Changing parameter type will lose pin values (but not connections)
    Fixed! UE-60711 Reloading blueprint with Diff window open will crash the editor
    Fixed! UE-60705 Crash - Triggering a Blueprint Breakpoint Multiple times with the Blueprint Editor closed Crashes the Editor
    Fixed! UE-60625 All pins are orphaned on a custom event call node when a pin is changed on the custom event
    Fixed! UE-60624 Hang when hosting an online ShooterGame match
    Fixed! UE-60584 Crash when doing PIE from Override Binding assets in QAGame
    Fixed! UE-60047 SDL2 needs to be rebuilt for armhf (32bit)
    Fixed! UE-59943 Linux crash on startup with Cook On The Fly
    Fixed! UE-59928 Linux: suppressing -fPIE does not work as intended.
    Fixed! UE-60217 User is not prompted to install the toolchain provided by UE4 when generating project files on Linux with an old clang version
    Fixed! UE-60858 Unknown project file type 'CLion error when generating project files for CLion
    Fixed! UE-60596 TestPAL crashes with MallocProfiler when trying to run on Linux
    Fixed! UE-60566 Standard error is spammed with "Used memory before allocating anything was"
    Fixed! UE-60398 4.20 modular binaries don't start on a number of Linux distros (Fedora, CentOS, Arch)
    Fixed! UE-57836 Crash dragging MaterialImportTest.abc with materials into level
    Fixed! UE-60146 Linux: EXR Image Sequences Render Black
    Fixed! UE-60767 ARM server fails to build with: undefined reference to SDL_ConfineCursor
    Fixed! UE-60242 Android Rendering issues on ARPG in Vulkan
    Fixed! UE-59864 RemoteSessionApp has no UE splash (loads with black screen)
    Fixed! UE-59576 Blending on meshes in Landscapes umap is not rendering properly in High End Mobile Preview or HTMl5
    Fixed! UE-60781 Blackscreen in app on Galaxy S6 SM-G920F
    Fixed! UE-60560 iOS: Errors During Build Step with dSYM File Included Due to Space In Project Path
    Fixed! UE-58463 Thermals are Nominal message appears on DebugGame and Development iOS packages
    Fixed! UE-57315 Match3 Sig 11 crash with GL RHIThread enabled
    Fixed! UE-60277 Vulkan -sm5 application fails to load: Error: The global shader cache file SF_VULKAN_SM4.bin is missing
    Fixed! UE-59572 Depth' blur needs to work on the new DOF
    Fixed! UE-59535 Enabling Support Compute Skincache causes textures to render incorrectly on SK_Mannequin in game
    Fixed! UE-59784 Static Mesh LODs are not changing their color based upon distance
    Fixed! UE-59425 Movable Volumetric Fog causing black artifacts on Particle Lights
    Fixed! UE-60901 DOF: take coc radius error into account when binning gathering sample
    Fixed! UE-60854 Diaphragm DOF second coc dilate is not being used
    Fixed! UE-60808 Material Collection Not Updated
    Fixed! UE-60775 MetalRHI: "FMetalShaderPipeline does not have member named..." errors compiling Test config
    Fixed! UE-59307 Add support for Compressed Volume textures in Vulkan
    Fixed! UE-60612 Crash in FD3D11DynamicRHI::SetResourcesFromTables
    Fixed! UE-57601 ShooterGame menu flashes in Vulkan on Linux
    Fixed! UE-53183 Re-do optimization from 3689687
    Fixed! UE-56009 Warning: Ambiguous search when launching TM-PhysicalLightUnits
    Fixed! UE-60268 Min Roughness light parameter not functioning properly
    Fixed! UE-60421 Extremely low frames on Context Examples - UMG with -vulkan
    Fixed! UE-60944 PIE after an Undo of an Added Sub-scene causes a crash related to UMovieSceneTrack::GetMaxRowIndex()
    Fixed! UE-60736 Using the Create Level Sequence Player node starts the sequence at a Random Start Time
    Fixed! UE-60686 Tracks referencing the same sequencer don't work properly in package build
    Fixed! UE-60841 Asset Size Mapper window text is clipped when High DPI is enabled
    Fixed! UE-60730 Texture Editor viewport glitches when editing adjustment attributes
    Fixed! UE-60699 Crash overwriting a recently-saved level
    Fixed! UE-60926 Camera Safe frames offset when High DPI Support is enabled
    Fixed! UE-60918 Vertices are offset from mesh when Large Verts is enabled with High DPI Support
    Fixed! UE-60770 Unable to Reset to Default on various settings in the details panel of Texture Editor
    Fixed! UE-60331 [CrashReport] UE4Editor_Landscape!ALandscapeProxy::FlushGrassComponents() [landscapegrass.cpp:1942]
    Fixed! UE-48724 [CrashReport] UE4Editor_Landscape!ULandscapeInfo::UpdateLayerInfoMap() [landscape.cpp:1459]
    Fixed! UE-48899 [CrashReport] UE4Editor_Landscape!ULandscapeInfo::RegisterActor() [landscape.cpp:1882]
    Fixed! UE-51914 [CrashReport] UE4Editor_CoreUObject!FWeakObjectPtr::Get() [weakobjectptr.cpp:81]
    Fixed! UE-60642 Modifying Curve Atlas Texture Size changes the curve index used by Material Instances
    Fixed! UE-60332 [CrashReport] UE4Editor_MeshEditor!FMeshEditorMode::CreateWireframeMeshComponents() [mesheditormode.cpp:4780]
    Fixed! UE-60261 EngineTest - MeshOrientation tests fail with: "Screenshot 'MeshOrientationTests_After Runup' test failed, Screnshots were different!"
    Fixed! UE-60877 Renaming and deleting parameters from the system/emitter editor deletes and renames inputs in modules.
    Fixed! UE-60874 Crash when editing float function inputs.
    Fixed! UE-60847 Curve evaluation doesn't work with interpolated spawn until interp spawn is turned off and on again
    Fixed! UE-60669 Renaming an Output Pin within an Niagara Script Details Panel breaks existing connections
    Fixed! UE-60548 Crash when redoing after undoing the addition of an emitter to a system
    Fixed! UE-53684 Niagara emitters without render modules will have a sprite module created for them when they're added to a system that can't be deleted
    Fixed! UE-59114 Widget clips incorrectly when added at runtime
    Fixed! UE-60731 Some widget elements render on top of the editor during PIE if they are wrapped by an invalidation box
    Fixed! UE-60592 Ensure when force deleting a Widget Blueprint referenced by the level Blueprint
    Fixed! UE-60342 Adding the Vehicle code feature pack to a project fails to compile with 'HMD_MODULE_INCLUDED' errors
    Fixed! UE-60884 Installed builds fail when ARKit is enabled by default
    Fixed! UE-60861 There are seams in the AR environment textures when applied to a skylight
    Fixed! UE-60783 ARKit 2.0 Preview Support
    Fixed! UE-60556 GearVR projects are not receiving Gear trackpad input
    Fixed! UE-53905 Oculus CheckIfPointWithinPlayArea function returns incorrect results
    Fixed! UE-51654 SteamVR plugin ignores windowed settings and forces app into fullscreen
    Fixed! UE-54455 MR Calibration: When calibrating with Vive, alignment models don't show up
    Fixed! UE-57633 ARKit: App Crashes when Swiped Off-Screen after Pressing "Start AR"
    Fixed! UE-60756 LiveLink Client Panel not refreshing for sources not added through UI
    Fixed! UE-60840 Crash dragging Spline Mesh Actor from modes panel into viewport

    REMEMBER: Please report any new bugs you find by following the How To Report a Bug Guide

    Comment


      Epic going ham on them bugs. Is this the effect of Fortnite success and the experience from developing it?
      Either way its awesome.

      Comment


        Amanda.Bott
        Can you confirm the UE4.20 will only run on MacOS 10.13+, and thus ditching the 10.12 support for future version of UE4?
        ________________
        Fabiano Friedrich

        LinkedIn | fabianofriedrich
        RevEngLab | www.revenglab.com
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        Comment


          Please have as many previews as you need to fix all the bugs! Awesome job so far though!
          Website/Portfolio: http://www.VictorBurgosGames.com

          Join me on stream: https://www.twitch.tv/VictorBurgosGames for UE4 Game Dev. If you need help, just stop by and ask!

          Lead Programmer - Contagion VR: Outbreak: http://www.indiedb.com/games/contagion-vr-outbreak

          Comment


            Am I the only one having weird artefacts with the new DOF ? (screenshot done with the last preview)
            Guillaume.Abadie

            Last edited by koola; 06-26-2018, 12:39 PM.
            _________________________________________________________________________________________________________
            WIP : ArchViz / Lighting : https://forums.unrealengine.com/show...chViz-Lighting
            WIP : Koola's stuff : https://forums.unrealengine.com/show...-Koola-s-stuff
            Youtube : https://www.youtube.com/user/koooolalala/videos
            Flickr : https://www.flickr.com/photos/99646627@N03
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            Comment


              Originally posted by koola View Post
              Am I the only one having weird artefacts with the new DOF ? (screenshot done with the last preview)
              Guillaume.Abadie

              I've only gotten these if you have a very narrow DOF, suggesting that the blur is just way too strong. Have you tried adjusting the blade count? Also you can reduce the DOF by setting the max f/stop in your lens setting, which changes it to "Custom", but allows you to go beyond what the lens is locked at(usually the max is f/22)... assuming this is with the Cine Camera...

              Lighting Artist @ Crystal Dynamics
              Former Lighting Artist @ Obsidian Entertainment
              ArtStation

              Comment


                Originally posted by koola View Post
                Am I the only one having weird artefacts with the new DOF ? (screenshot done with the last preview)
                Guillaume.Abadie

                First issue: what quality settings it that? I just fixed an issue like this yesterday. I'll investigate.

                Second issue, is known a limitation of the algorithm for foreground when it have large variety of foreground Circle of Confusion. There is ideas on how to fix that, but doable in the timeframe? Work around, you can bind your maximum bluring radius independently for the foreground with r.DOF.Kernel.MaxForegroundRadius.

                Comment


                  Playing with Niagara instanced mesh render particles, and noticed that one of my 100 particles shows up in VR. For some reason, the particle instancing isn't showing in VR. Is this a known issue? This is in CPU mode.

                  When I switch it to GPU mode, the particles show up in only one eye.
                  Last edited by 3dlight; 06-26-2018, 04:26 PM. Reason: Additional info

                  Comment


                    Originally posted by rosegoldslugs View Post

                    I've only gotten these if you have a very narrow DOF, suggesting that the blur is just way too strong. Have you tried adjusting the blade count? Also you can reduce the DOF by setting the max f/stop in your lens setting, which changes it to "Custom", but allows you to go beyond what the lens is locked at(usually the max is f/22)... assuming this is with the Cine Camera...
                    Thanks for your reply.
                    The thing is, even with a "light blur", I've got some of this artefacts





                    Originally posted by Guillaume.Abadie View Post

                    First issue: what quality settings it that? I just fixed an issue like this yesterday. I'll investigate.

                    Second issue, is known a limitation of the algorithm for foreground when it have large variety of foreground Circle of Confusion. There is ideas on how to fix that, but doable in the timeframe? Work around, you can bind your maximum bluring radius independently for the foreground with r.DOF.Kernel.MaxForegroundRadius.

                    Thanks for your reply too
                    All screenshot are in Epic quality.
                    it's really weird, most of the screenshots / videos I saw did not seem to have any problem.
                    Last edited by koola; 06-26-2018, 01:32 PM.
                    _________________________________________________________________________________________________________
                    WIP : ArchViz / Lighting : https://forums.unrealengine.com/show...chViz-Lighting
                    WIP : Koola's stuff : https://forums.unrealengine.com/show...-Koola-s-stuff
                    Youtube : https://www.youtube.com/user/koooolalala/videos
                    Flickr : https://www.flickr.com/photos/99646627@N03
                    HK Devblog : http://hk-devblog.com/

                    Comment


                      Originally posted by koola View Post

                      Thanks for your reply too
                      All screenshot are in Epic quality.
                      it's really weird, most of the screenshots / videos I saw did not seem to have any problem.
                      This sort of issue even on small convolution should not happen, would you be able to share your level with place cameras, as well as resolution settings?

                      Comment


                        Found that I actually missed preview 4 window, there is 9 DOF fixes that have not made it into the preview 4, but are on latest 4.20 github.
                        Last edited by Stephen Ellis; 06-26-2018, 02:07 PM.

                        Comment


                          Originally posted by Guillaume.Abadie View Post
                          Found that I actually missed preview 4 window, there is 9 DOF fixes that have not made it into the preview 4, but are on lattest 4.20 githug.
                          Cool! I will try again on the next preview
                          _________________________________________________________________________________________________________
                          WIP : ArchViz / Lighting : https://forums.unrealengine.com/show...chViz-Lighting
                          WIP : Koola's stuff : https://forums.unrealengine.com/show...-Koola-s-stuff
                          Youtube : https://www.youtube.com/user/koooolalala/videos
                          Flickr : https://www.flickr.com/photos/99646627@N03
                          HK Devblog : http://hk-devblog.com/

                          Comment


                            Awesome,

                            Can't wait for the UE-60858 Clion fix!

                            Comment


                              Trying to download 4.20 but launcher library only contains 4.19.2. Clicked on + button but that only brings up 4.18, am I missing something?

                              Comment


                                Originally posted by jgbrock View Post
                                Trying to download 4.20 but launcher library only contains 4.19.2. Clicked on + button but that only brings up 4.18, am I missing something?
                                There is an arrow where the version number appears, which you can click and see the list of all versions including the 4.20 preview
                                Nilson Lima
                                Technical Director @ Rigel Studios Ltda - twitter: @RigelStudios
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                                Comment

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