Hello! I was trying out landmass and water plugins in UE5. After creating a new map, adding basic lightning and landscape I have added landscape → sculpt → blueprint → blueprint brush → CustomBrush_Landmass. While in tutorials it was looking like a little triangle, I have some mess which I was not being able to undo tweaking settings in the details of the created spline
Also after that I have tried to add a water to the level, which is also looking not as pretended. Also when walking to the water the character just floats over it (as if there were no water and ground drop).
Still need to confirm that your issue is the same though. Try the steps here and see if you get the same result. I also verified it occurs on windows while using Vulkan. Unreal Engine Issues and Bug Tracker (UE-152752)
The bug is still occurring when following steps from the issue you have listed in exactly the same manner
Additionally when there is a “world partition” enabled instead of inverted distorted triangle → there is a distorted tower that appears just as in the provided screenshot in the original post above