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[Help] Trying to paint my landscape but the layers don't blend well.

Hey everyone, I asked the unreal engine subreddit about this but I didn’t get any help so I’ve come here to see if anyone knows what’s going on.

I’m currently following this tutorial:

https://youtu.be/a0qNO6_xPx0

I’m at this point in the tutorial (timestamped):

https://youtu.be/a0qNO6_xPx0?t=6730

and I’ve gotten to the point of sculpting a landscape I like. Now I’m trying to use the materials we’ve made to paint different layers on it. The issue is when I try to do that there are some areas of the terrain where it refuses to blend smoothly.

It doesn’t seem to be a LOD and I’ve checked most smoothing settings but haven’t been able to get anything to work.

How can I fix this?

Images/Gifs:


https://streamable.com/gbton
https://streamable.com/nrxk2

My view of the painting menu under landscape and the general view:

My material:

https://i.imgur.com/aMN2geI.png - Overview
https://i.imgur.com/RyznFkL.png - Base Color
https://i.imgur.com/hZEh6bI.png - Roughness
https://i.imgur.com/8IEAZrS.png - Normal
https://i.imgur.com/IIr9zWD.png - Normal zoomed

Apologies for the bad quality.

I’d be happy to provide any additional materials to help figure this out.