interface_build {
    {r.surf.area} 0
    {Generate a raster surface map(s) for specified fractal dimension, using spectral synthesis method.}
    {entry out {Output fractal raster surface map:} 0 raster}
    {entry d {Fractal dimension of surface (2<value<3) [default=2.05]:} 0 ""}
    {entry n {Number of intermediate raster maps to produce showing buildup of different spectral coefficients:} 0 ""}
}