Unreal Engine 4.26 Preview

General Announcements
582

This was mentioned a few posts back and in my reply there I commented that this error has already been fixed. You can actually fix it yourself by just changing two lines in that shader file.

In Engine/Shaders/Private/Tessellation.ush make lines 178 and 179 look like this using a text editor:


Result.Tangent0_U.w = UV.x;
Result.Tangent1_V.w = UV.y;

Save the changes and then just reopen your project and the error should be gone after some shader compiling.

583

I think when using the RuntimeVirtualTextureVolume:

  • in 4.25 the location of the actor was the center of the volume
  • in 4.26 the location of the actor is a corner of the volume
    So virtual textures render incorrectly.
584

The composite texture feature doesnā€™t work with VT UDIMs:

Composite_UDIM.jpg
Composite_UDIM.jpg1158Ɨ837 102 KB

585

Please report to Epic using bug report form.

586

I was really hoping the clouds and water would work in VRā€¦ as a matter of fact, a lot of things only work in one eye. SSGI is a HUGE oneā€¦ but hopefully all features in soon-to-be-released (fingers crossed) UE5 will work. Maybe thatā€™s why a lot of stuff doesnā€™t work in 4.26. Iā€™m praying thatā€™s the case.

587

Getting the following error and crash after updating 4.26 to Preview 7 when I try and open a project.

Is this a known issue? How can I recover my project if I canā€™t open it?

588

Unreal 4.26 Preview 7

After enabling the Lightmass GPU and Ray Tracing op, Unreal crashes and wonā€™t open again, Iā€™m using i7 8 generation, 32 RAM, RTX 2080

589

So i guess in preview 7 Gpu lightmass is not working,right? Cuz unreal crashing every time when i try to enable. virtual textures. Is there any way to return to preview 6?

591

Same here, after installing Previw 7 and enabling GPU_Lightmas . UE crashes at restart :frowning:

592

I use screen space reflections ,The sun covered by cloud,but water still reflect the sun ? please help me how to fix it.

593

Here is the other artifact Iā€™ve mentioned before. I wish someone from epic would look at these posts and let us know if they are actually ā€œbugsā€ or limitations of the tech. I am assuming this is 99% of the reason why people donā€™t fill out bug reports. Someoneā€™s job should solely be to look at these threads and reply to posts letting us know whether or not they are bugs or limitations. Hereā€™s the cloud artifact again. You can see the clouds showing up in front of the wave circled in red. Is this what itā€™s supposed to look like at this point or is it a bug that should be reported?

594

GPU Lightmass is not compatible with 4.26 Preview 7? Am getting a lot of shader compilation errors on launch pointing to this plugin and crash on startup.
Solution is to disable the plugin in .uproject file.

595

ā€œCrack Free Displacementā€ is a bug in UE 4.26 preview 7.

596

Surfaces behind objects with a SingleLayerWater material applied flicker heavily with RTGI enabled:

597

The same issue with 4.26 Preview 7, GPU Lightmass does not look like itā€™s working, crashing immediately on launch of the project, with the FStationary error.

599

Could someone do a short video using 4.26 p5(source) on caching? I think 4.26 p6,p7 would work. Thanks.

600

Just compiled my mobile project and this is how it looks like when using movable spotlights!

601

How do we turn on the foam for the wavecaps? I can get the shoreline foam working but not the waves. Thanks!

602

Yes you can rollback by building from source on their github (you will have to link your github and epicgames accounts to access it),
https://github.com/EpicGames/UnrealEngine/tree/4.26.0-preview-6

There is all the informations in the readme, and you can find some tutorials on youtube if needed :wink:

It worked for me.

604

try it in D3D11 or default_RHD or whatever its called, the default one, instead of DX12. dx12 seems to give me problems everytime i use it