Hi,
If you are using and old build of Ox this method should work just fine, just make sure to ground strands by selecting a new Distribution Mesh in GroundStrands operator, then click Attach Roots button.
If you are using the latest nightly build, there is a bug with the new display mode that cause the hairs to disappear from the viewport, we are working to fix this on the next nightly build. If that is your case, select the hair shape in the hair stack, in the attribute editor go to Hair Display and switch from OptimizedMesh to Mesh.
However, there is an easier way to transfer hair from xGen to Ornatrix:
1) Follow the video until step 2,
2) Create a hair object on your character,
3) Right click on the top operator on the stack and select Collapse up to here. This should create a BakedHair operator,
4) In the BakedHair operator you can load the xGen Alembic file.
You can use this method to transfer Ox hair to any host, grooms between characters or grooms between Ornatrix and any other hair tool that suports Alembic.
BakedHair operator documentation here: https://ephere.com/plugins/autodesk/maya/ornatrix/docs/2/Baked_Hair.html
Jeordanis Figuereo (Product Designer. EPHERE Inc.)