Poor quality and jittery procedural mesh texture.

[vbs]

I generate some procedural meshes and I see really low quality and jittery mesh material. How could I fix this?

In game, poor quality material

Each quad (2 triagles) is 100 x 100 units

I generate my UV0 vertices like so:

UV0.Add(FVector2D(
    (X + verticesArraySize),
    (Y + verticesArraySize)
)); // BottomLeftIndex
UV0.Add(FVector2D(
    (X + verticesArraySize),
    (nextY + verticesArraySize)
)); // BottomRightIndex
UV0.Add(FVector2D(
    (nextX + verticesArraySize),
    (nextY + verticesArraySize)
)); // TopRightIndex
UV0.Add(FVector2D(
    (nextX + verticesArraySize),
    (Y + verticesArraySize)
)); // TopLeftIndex

I have some functions that wrap the generation details and I set the material for each section like so:

void AProcTerrain::GenerateMeshSection(int32 sectionIndex, FVector location)
{
	GenerateGrid(Vertices, Triangles, Normals, UV0, Tangents, VertexColors, sectionIndex, location);
	mesh->CreateMeshSection_LinearColor(sectionIndex, Vertices, Triangles, Normals, UV0, VertexColors, Tangents, true);
	mesh->SetMaterial(sectionIndex, Material);
}