MaterialDef GrassVertex {

    MaterialParameters {
        Float   WindSpeed    : 1.0
        Float   WindStrength : 0.15
        Vector3 SunDir       : 0.35 0.8 0.45
        Color   SunColor     : 0.95 0.90 0.75 1.0
    }

    Technique {
        VertexShader   GLSL150: Shaders/GrassVertex.vert
        FragmentShader GLSL150: Shaders/GrassVertex.frag

        WorldParameters {
            WorldViewProjectionMatrix
            WorldMatrix
            Time
            AmbientLightColor
        }

        RenderState {
            FaceCull Off
        }
    }
}