to import a tiled terrain from Worldmachine into version 4.6. When I got to this:
the ‘import’ button was greyed out. My settings look exactly the same as on the picture, EXCEPT for my Import Configuration which says:
“Components: 0x0 Sections: 1x1 Quads: 63x63”
I had this problem when I enabled “Merge to single file” in the Tiled build option of WorldMachine. Uncheck it and generate one file per tile and then in UE select all tiles (in r16 format) worked for me.