compositor brightness_contrast_gamma
{
    technique
    {
        // render scene into texture
        texture SceneBuffer target_width target_height PF_A8R8G8B8

        target SceneBuffer
        {
            input previous
        }

        target_output
        {	
            input none

            pass render_quad
            {
                material mat_brightness_contrast_gamma
                input 0 SceneBuffer
            }
        }
    }
}