This tutorial is an advanced version of creating grass using displacementMod. Instead of displacing the grass with a heightmap, we’re going to use the Fur modifier to generates the grass as geometry at render time.
The cool thing about it is that you have quite a lot of control over the size, bend amount, direction variation, randomization, density, and more. Plus, you can even use custom maps to shape and manipulate all of these parameters.
Below the video, you can see an explanation of how an RGB image can affect the bend direction of the grass shown at the end of the tutorial.
- Analyze real-world grass photo
- Adjust Vray Fur settings
- Create Grass material
You can use custom maps to control the direction and variation of the following parameters: bend direction, Initial direction, length, thickness, gravity, bend, and density.
In the example below I’ve used a single RGB map (watercolors painting that I’ve downloaded from the web) to control the bend direction of the grass. you can add any map or create your own to get a specific look.
The color map which affected the bend direction:
in the diagram below you can see the direction flow of the fur, represented by arrows, on top of the RGB color wheel: