GPU Pro 6

2

II

Grass Rendering and Simulation

with LOD

Dongsoo Han and Hongwei Li

2.1 Introduction

Grass rendering and simulation are challenging topics for video games because

grass can cover large open areas and require heavy computation for simulation.

As an extension of our previous hair technology, TressFX [Tre 13], we chose grass

because it has unique challenges. (See Figure 2.1.) Our initial plan was to support

rendering many individual grass blades covering a wide terrain and simulating

their interactions using rigid bodies and wind.

To satisfy our requirements, we developed an efficient and scalable level-of-

detail (LOD) system for grass using DirectX 11. ...