// Copyright Contributors to the Open Shading Language project.
// SPDX-License-Identifier: BSD-3-Clause
// https://github.com/AcademySoftwareFoundation/OpenShadingLanguage

surface rough_matte(
    float Kd = 1,
    float sigma = 0.1,
    color Cs = 1)
{
    Ci = Kd * Cs * oren_nayar (N, sigma);
}
