Hello, dont know why my meshes distance fields look like this 
It’s just basic meshes imported from blender
psl help ^^’
I suggest looking closer at this: Mesh Distance Fields in Unreal Engine | Unreal Engine 5.0 Documentation
You can modify the resolution, which should solve your problem:
Make sure the material isn’t two sided. Works better with closed solid meshes.
unapplied modifiers on blender where the problem 
, aplied everything and reexported it, works fine now