Help with Maya Arnold clipping mask
 

I am trying to make grass using an image I made in photoshop, but whenever I render it using arnold the grass in the back is black instead of transparent. Does anyone know what I am doing wrong?

I am using maya 2019 on a macbook pro.

Attachment 57751

Attachment 57752

Attachment 57753

Increase Transparency Depth value until all the grass are rendered correctly with transparency