Loss of MetaHuman hair in Split Screen mode of the second player (right screen)

[martem000 (Artem)]

Hi, I am using Unreal Engine 5.1. I am making a game for two, gamepads are configured, Split Screen vertically is enabled.

The problem is that the hair is not displayed on the right side of the screen for all MetaHumans. At any distance.

Tried replication and forced LOD.
Nothing has helped so far. Maybe you have some ideas?

[SupportiveEntity]

Hey there @martem000! There’s a number of things that can cause meshes or parts to disappear in the second screen. I couldn’t find a thread that worked with the grooms that actually had any solutions, but I’ve brought a couple of threads that might give some insight while not providing the solution here.

Material:

When In split-screen if main player looks away the rendering messes up behind him.

So I think I found a solution. The key is to turn on the material to be two sided.

Nanite:

Split Screen Mesh Render Bug?

For anyone having the same issue (Though possibly quite rare), as expected, it’s a problem that UE5 has rendering Nanite meshes. The UE5 engine can’t render the same Nanite mesh twice, meaning Nanite is un-usable for Split Screen or Virtual Reality. In short - The solution is to just not use nanite meshes at all when making games in Split Screen or Virtual Reality (VR) and possibly anything else that uses two renders of the same scene.

Foliage:

Foliage disappearing in split-screen

When my game goes into split-screen mode, for one of the players grass will not render on their screen. it will render fine for most of the other players, then while playing it will pop back into existence for the one player, and go away for another. It will often disappear in random patches and then come back. I’d like it to be consistently visible for all players. Any idea what’s causing this? In the image here, you can see player 1 isn’t rendering the tall grass, while player 4 sees it fine…

[martem000 (Artem)]

Thank you! I tried these tips, but it didn’t work(

I set all hair materials to Two Side.
Nanite in MetaHuman is not enabled.
In the project settings, I turned off the Occlusion Culling setting

[SupportiveEntity]

It’s possible that Grooms also can’t be rendered twice. Could you open up your metahuman, select the hair grooms and look for an option “Use cards”? This will decrease your quality by a decent margin but should render immediately if my hunch is correct.

[martem000 (Artem)]

@SupportiveEntity

Use cards

Thank you so much! It helped for the guy, but the girl’s hair just disappeared!

I think it is LOD 0, 1 just disappear. The other girl’s hair is displayed with these settings.
But the hair color changes to dark on the guy and on girl #2.

Simplifying MetaHuman also helps. LOD 2 - displayed on all screens. But some hair disappears in this case.

Is it possible to render maximum graphics in Split Screen mode?

[SupportiveEntity]

Hrm so we learned grooms can’t be rendered twice like other pseudo geometry. Did you make her hair two sided like you did for his? Check the differences between the groom settings and see if there’s anything that sticks out that’s sensible.

Edit: In response to the hair color changing… I have no idea why the cards would change that. You’ll have to compensate in the material most likely.

[martem000 (Artem)]

Thank you so much for your help!

The double-sided material doesn’t help.
But it would be cool to find a solution to use maximum graphics in Split Screen without losing hair maximum quality

[SupportiveEntity]

I’m doing a bit of digging on if there’s a simple way to remove the limit on groom renders, but I doubt the limit is arbitrary. Like Nanite, some systems are meant to only be able to render once and can cause problems outside of that.