We have managed to render some blades of grass, but when moving the camera, it quickly becomes clear that the blades are only a 2D image and don't have any volume themselves. This problem can't be easily solved without rendering each blade of grass with our own 3D model, which would improve the visual effect a lot but also is almost impossible because a big grassland would slow the rendering process so much that every interactivity is lost. But there are several techniques to make this problem less problematic. We can see one of them now.