Weird LoDs behavior on Landscape tiles

The problem happens with linear and Square root LODFalloff.

Here some pictures


Hi ,

I am happy to help with this error, however can you be a bit more specific. What is occurring that seems to be an error? Are these multiple landscape tiles or is it all one large landscape tile?

I’ll try to be more specific.

We are using World Composition and you’re looking at 2 different tiles. The one right under the camera is where my character is positioned, and the one with a large blue area is another tile.

So why the furthest tile is getting a “near” blue LoD? That tile should be completely fuchsia. Also if 2 tiles don’t have the same LoD, they will not blend together and you can see under the landscape.

Let me know if you need more info.

is your landscape set up to automatically change color based on the world offset position? I’m a bit confused as to why the colors would be entirely fuschia.

Nope, that’s the Lod Visualizer inside UE4 :slight_smile:

Ah, you taught me something I didn’t know today! After testing with the LOD visualizer, I am not seeing the results you are. Can you send me a sample project that is experiencing this error? I’d be happy to take a look!


150MB with bug :slight_smile: Tile 3x 3y

Hi ,

I was able to reproduce this and have entered a bug report, UE-11825 to be assessed by the development staff.

Hi , the weird LOD behavior you’re seeing is because not all of the sublevels have the same Landscape LODDistanceFactor applied. This can occur if you change the property on the main Landscape actor without all of the sublevels loaded.

The solution is to load all your sublevels, select the Landscape3 actor and change LODDistanceFactor to something other than 10. You could change it back to 10 again, but I think 10 value causes way too fast LOD falloff and would recommend something smaller. Anyway, once you’ve changed it, save all sublevels and the LOD issues and visible seam will disappear.

I’ve modified the ticket UE-11825 so that it records the original bug, ie that changes to LODDistanceFactor are not applied to sublevels if they’re not loaded at the time of the change. Hopefully we can get that bug fixed so this won’t happen in the future.


Thank you very much !

How do you open the landscape visualization mode, I asked a question the other day about it and cannot seem to locate how to turn it on

It’s in the editor viewport under “Lit” menu, under Landscape, Visualizers.