Blocky Texture on landscape on VR

I recently converted my project to 5.1.1 from 4.27. But Landscape texture all messed up in VR (it is okay in engine viewport).
Edit: Not just landscape other materials also affected.

I didn’t even know backwards conversion was possible; if it was possible, I wouldn’t be surprised if it created a mess of everything. What’s the landscape heightmap look like?

This is not backward conversion. 4.27->5.1.1. I made new landscape from scratch but it also had blocky texture. I think problem is in the materials because I noticed this texture error on objects other than landscape.
I put height map here anyway:

Oh sorry, I misread your word order. Your height map does look normal, are your buffers indicating an issue of any kind? Also, is there a reason you chose 5.1.1 instead of 5.3 or so?

no particular reason, I just installed 5.1 while ago that’s all. I don’t know if I had any buffer issue, how do I check?

Go into the different visualization modes like base color, roughness, etc. If the other textures all look blocky, then it could be some sort of sampler issue, but if it’s just your heightfield that’s blocky,then your issue is more localized.

Also, is this forward or deferred rendering?

forward rendering but deffered rendering didn’t work also. I compared vulkan vs ES3.1 previews and only vulkan has this blocky effect. So I guess I am gonna have to make it work on opengl.

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