# ppmforge > Generate fractals resembling clouds, planets and starry skies. > More information: . - Generate an image of a planet: `ppmforge > {{path/to/image.ppm}}` - Generate an image of clouds or the night sky: `ppmforge -{{night|clouds}} > {{path/to/image.ppm}}` - Use a custom mesh size and dimension for fractal generation and specify the dimensions of the output: `ppmforge -mesh {{512}} -dimension {{2.5}} -xsize {{1000}} -ysize {{1000}} > {{path/to/image.ppm}}` - Control the tilt and the angle from which the generated planet is illuminated: `ppmforge -tilt {{-15}} -hour {{12}} > {{path/to/image.ppm}}`