I am having trouble getting the grass control map to work. I have attached several screen snaps showning the scene from the Scene View and Game View, the Contraol map I used, the UV map of the mesh, a screen snap of the mesh and finally, the script settings. Basically, from the control map I would have expected to get a stripe of grass, but I am only getting one of the polygons of the mesh filled with grass???
The script generates grass only around the camera in game view. So you might have to move the camera. Have you tried assigning the control map to the mesh renderer. This way you can preview where exactly in 3D the grass should be placed. If all of that doesn’t work, you should try subdividing your mesh a bit more. The grass generator script works better with finer tesselated meshes.