About Grass Shader tutorial, double sided doesn't work

DeadPixel

Hi! i'm starting my journey in 3D into Unity, and i ran into a problem when i tried to make the grass shader, first i tried with my own texture, and double sided - flipped normals didn't work at all, so i downgraded unity version to 2019.3 and used the assets you provide and yet i can't make the object double sided... Watching some forums on people programming their own shaders, some guy said something about multiple pass in order to render the other side but idk if that would help... Thanks for reading, hope you can help me, i don't want to do some tricky stuff like adding another face facing opposite direction in my model...