Kwistenbiebel was generous enough to share his grass materials for external rendering. I used the clipmap provided by him to create a png with alpha channel and re-applied that material to his original model. Note that it is not coincidental that I have the concrete surrounding for the bits are off the edges of the original component (Hide the concrete to see). Also, no good for aerial views just for side views. I also duplicated the whole group I have made of his components and rotated one instance to make it more "dense". Renders pretty fast (as there is no much geometry in it. All credits go to him. The original link to his component is below.