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Tesselated displacement material on landscape cause flickering

When I apply tesselation displacement to my landscape, it is a flat surface, My landscape square component flicker ( appear / disapear ). When I sculpt some height value to the terrain flickering stop. The problem is that I need to keep it Flat.

Is there a solution for this bug ?

alt text

I don't add screenshot because the issue is not visible due to the speed of flickering. I should try to capture a video.

Thanks in advance.

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asked Mar 17 '15 at 01:50 PM in Rendering

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avatar image fourche13 Mar 17 '15 at 01:51 PM

PS :Tesselation is set to PN triangle

avatar image Alicecold Jun 30 '15 at 06:00 AM

I have exactly the same problem, and it applies to landscapes, basic meshes and bsp.

While this is not a solution, I've experimented a bit:

  • It seems like it is caused by some kind of intersection, objects that are stacked upon each other or are intersected with other objects seems to almost always flicker. (...may this be why it disappears for you when you sculpt some height to it?)

  • Decreasing the displacement height makes the problem disappear completely (this is troublesome however, since I would like the height to be visible at all)

  • Using Lightning Quality better than preview might - if not "placebo" from my side - make it appear less often as well.

  • And finally, and most annoyingly, when the object is just about to leave or enter the camera frustum (or that is what it looks like at least). (If it weren't for this it would be easy to at least take intersection in consideration when creating a level)

I hope my ramblings helps a little bit at least :)

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answered Jun 30 '15 at 02:29 PM

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avatar image AndrewHurley Jun 30 '15 at 03:15 PM

Increase the 'Bounds Scale' of the Actor itself.

avatar image pmlvl Jul 23 '15 at 01:19 PM

Landscape don't have this option in Rendering tab, but guys how You do that in kite demo there is no flickering landscape. My Terrain is very small but when i put tessellation, welcome in flickering mode.

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