why my hair-card mesh rendering looks so bad(pixlated and dotted)

Development Character & Animation
1

{DEB2A22E-14CC-44DE-B4C7-D70EA9F96471}
{DEB2A22E-14CC-44DE-B4C7-D70EA9F96471}479×595 45.4 KB

the better one is groom version, and the broken one is mesh version
{4FE83BC0-4484-4D08-B32C-F0F3F6164A58}
{4FE83BC0-4484-4D08-B32C-F0F3F6164A58}1517×911 268 KB