Procedural foliage disappears/flickers when camera turns? (video)

Cosmik-Debris · September 2, 2015, 8:45pm

Why does my foliage do this? Sometimes it flickers like crazy as well

https://www.youtube.com/watch?v=6O6YamYWs-8&feature=youtu.be

Cosmik-Debris · September 3, 2015, 5:00pm

Still stuck on this! My foliage is in a sub level of a large tiled world. I don’t get this problem if it’s in a basic map with only one level. Could be to do with the world origin changing maybe?

anonymous_user_f9f0806d · February 12, 2016, 3:15am

Did you ever figure out what was causing this? We are seeing the same issue currently and can’t figure it out. We are also using sub-levels with world composition.

Cosmik-Debris · February 12, 2016, 5:45pm

Hi sbounds, yes I did work it out!

Make sure the procedural foliage spawning volume is placed in the correct sub level and it does not go over the edge of the level bounds.

Never place foliage in the persistent level!

Hope that works for you

S9BL · August 30, 2016, 10:04am

This did not fix it for us.

We have the following repro steps to confirm it is world origin related.

Create a world composition world with a single tile (about 1km x 1km)
Place down a foliage spawn volume, doesn’t matter what foliage it spawns, just make it fairly large over the tile
Play in editor, and walk away from the volume.
In the console, call SetWorldOrigin
The foliage will now start flickering based on camera orientation

At a guess, the instanced foliage hit box transforms are not being updated correctly to reflect the world origin change

Thanks,
Ben

anonymous_user_f9f0806d · August 30, 2016, 7:54pm

This hack is what ended up fixing it for us, placed in the BeginPlay event on the player character. I can’t remember where I got it from though to credit who figured it out, either here on answerhub or a forum somewhere. Would rather have a real fix though.