How do I make my own grass?

Oooh I see what youre saying, I need to have a flat plane fbx and apply the texture to it. Or parts of the texture I want to use as the grass. Sounds like something I need to learn how to make. Any resources on how to make these planes and apply the textures to them? I searched thru youtube and such but seems to be more videos about high quality grass scenes in 3dsmax and such. Thanks