ppmforge

Generate fractals resembling clouds, planets and starry skies. More information: https://netpbm.sourceforge.net/doc/ppmforge.html.

• 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 {{[-m|-mesh]}} {{512}} {{[-d|-dimension]}} {{2.5}} {{[-x|-xsize]}} {{1000}} {{[-y|-ysize]}} {{1000}} > {{path/to/image.ppm}}

• Control the tilt and the angle from which the generated planet is illuminated:

ppmforge {{[-t|-tilt]}} {{-15}} {{[-ho|-hour]}} {{12}} > {{path/to/image.ppm}}