This is the 6th episode of unreal engine high performance grass system. Here we are going to work on how the growth of grass is affected by the fertility of ground. That means, we have defined a grass/green layer and a dirt/yellowish layer in the landscape material. As the landscape is fading from grass to dirt layer, based on the weight of the grass layer, the height and color of the grass blades will be changed. In yellowish area grass will be shorter and more yellowish. In the green/fertile area, grass will be taller and greener.