Realistic Real Time Grass Rendering With Unity. Using the Geometry Shader to generate millions of grass on GPU.
ref:Edward Lee
Using the Geometry Shader In Unity To Generate Countless Of Grass On GPU
Unity 5.6+
Unity 2017.3 supports 32-bit index buffer.
【1】《Chapter 7. Rendering Countless Blades of Waving Grass》
【2】《Rendering Grass Terrains in Real-Time with Dynamic Lighting》