Geometry flickering

Development Rendering
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1

I believe it is because of Z-fighting.

2

I’m not sure how to describe this problem because I’m new to Game Development and I don’t know the proper terms. Basically when I put my geometry flush with my Grid is starts to flicker like crazy. I’m following a course on Udemy. Here is a video I recorded:

This is a fresh install of Unreal Engine. Everything is set to their defaults.

Thanks to everyone in advance!

3

Welcome! I’ve always had this problem as well. Other forum posts tend to blame it on graphics card drivers but I’ve gone through 3 months of Nvidia drivers and they all have this issue. I have found two work-arounds for this:

  1. In the viewport, click the down-arrow in the top left and un-check ‘Realtime’ (alternatively press CTRL+R). Screenshot included below.
  2. Simply don’t build levels with surfaces flush at Z = 0. If you are using the grid as a visual aid, you can always switch to the top-down Ortho mode instead of Perspective or simply place your floor at Z = -5 cm or more beneath the grid. I recommend this option to avoid the flickering in all situations. I typically build at Z = 100 cm as my base.

Best of luck with your tutorials and future work! I believe the Realtime checkbox will control whether animations and
other visual effects will live-render in your viewport.

4

I’m also new to UE 4 and having the exact same problem!! Thank you so much!!

5

Wow awesome thank you so much!!!

6

I had the same problem, thanks!
I noticed that when I disable the anti-aliasing (under the “show” menu in the editor), the flickering no longer occurs, but just building levels at Z = 100cm and having anti-aliasing still enabled seems like a much better solution.

7

Hello PhidlerCrab

If your problem solved, can you “mark” this question as “resolved” to helping future UE4 users so they can find the solution if it occurs again.

Tahnk you.

8

Oh my bad! How do I do that?

9

https://answers.unrealengine.com/static/how-to-use-answerhub.html

10

The grid is rendered on the exact same plane. This will always cause z-fighting.
I kinda wish Unreal rendered the world grid at 0.00000001 to avoid this.

11

I was getting such a headache from the UI always flashing. You saved me. Thank you.