Grass and file export

Hey all,

I’m new to blender. What I need is a little triangle or quad with some grass on it. I read a lot of the blender particle system and I did a tutorial to do that. That works fine but I have to export the scene either as .obj or as .3ds file.
If I do that I doesn’t get any of the grass particles in the exported file. There is only the triangle in it.
So I think there is no way to export the generated particles?
Is there any other way to model grass, which I can export as file and use it in my own renderer?

Many thanks for your answers!

There is a fiber script which makes actual grass geometry, not particle hair.