Vascularity HD not in iray preview

in New Users
I'm trying out this product https://www.daz3d.com/vascularity-hd-for-genesis-3-female-s-and-genesis-3-male-s
but I can only see the vains when I press render, not in the iray preview mode making it hard to choose how much vains I want to add.
How can I see them in the iray preview?
Comments
Are you using Photoreal or Interactive drawing style in your Iray preview?
Photoreal
Here is an example
left is render and right is preview.
Am I the only one who has this problem?
If the subdivision level is set to the default 1 for the viewport, I assume you won't see any HD effects on the figure. Try changing it to 2 or 3.
Oh nice. I changed the subd of the figure to 2 and now I can see it. Thanks.