V-Ray Grass

If you are using v-ray and don't use the VRayDisplacmentMod, then you should switch to mental ray! I use both, but v-ray is very powerful at performing geometric displacement, and is superb at creating organic objects; even grass looks good with displacement. Mental ray is good at displacing small polygons of geometry, where V-ray is good at displacing detail over large polygons. For this reason v-ray 1.50 sp1 is much more successful at creating grass for very large sites; a big plus!

A torus-knot with VRayDisplacmentMod modifier (light cache & irradiance map with 2 vray area lights)

The shader is simply just a VRayMat, with a grass map in the diffuse slot. Then I applied the VRayDisplacementMod modifier to the object. I instanced the image map from the shader into the displacement modifier.

VRayDisplacementMod settings:

• For something like grass it’s very important to use 2D mapping rather 3D mapping.

• I instanced the image map from the shader into the Texmap.

• I changed the amount to 4” to have taller grass blades.

• I increased the resolution to 2048 for better quality.

Voila, beautiful grass!

(notice the render times)