Parameter files

Fractals can be saved as parameter sets as well as in fractal files. Parameter sets are much smaller than fractal files because they do not contain the calculated pixels. That means that the fractal has to be recalculated when a parameter set is opened. Parameter sets are ideal for sharing fractals with other users on the Internet.

Parameter sets are stored in parameter files. A parameter file (*.upr) can contain any number of parameter sets. This makes it easy to store and organize collections of parameter sets. Parameter files are stored as plain text and can be opened in text editors such as Notepad or the built-in formula editor.

Ultra Fractal saveparameters Parameter files  

To save a parameter set, click Save Parameters on the File menu. The Save Parameters browser will open. You can save the parameter set in an existing parameter file or in a new file. Type the name of the file and the title of the parameter set and click Save.

Ultra Fractal browse Parameter files  

To open a previously saved parameter set, click Browse on the File menu. This opens a modeless browser. Select the parameter file that contains the parameter set that you want to open, and then double-click the parameter set inside the file.

You use browsers to organize and manage your parameter sets and parameter files, as well as other files that contain multiple entries, such as formula files. See Browsers.


  • By checking the Save Formulas checkbox when saving a parameter set, the formulas used by the fractal are embedded in the parameter file. When opening the parameter set, they will be installed if they are not already present in the formulas folder. Check this option when you are going to send the parameter file to another user (but not on the mailing list).
  • Parameter sets larger than 2 KB are saved in a compressed format. To save them without compression, open the Options dialog and uncheck the Compress parameter sets larger than 2 KB option in the Fractal tab. This is necessary if you want to edit the parameter files manually.
  • Ultra Fractal can also import most Fractint parameter sets in PAR files (*.par). They can be opened just like other parameter files.

Next: Copying and pasting fractals

See Also
Quick Start Tutorial
Fractal windows

Parameter files