Render jobs

When you start rendering a fractal or a parameter file, a render job is created that performs the requested calculations in the background. Render jobs are monitored and managed in the Render to Disk tool window.

Ultra Fractal rendertodisk Render jobs

The tool window contains a list of render jobs. Below the list, the status of the selected job is shown, including various statistics.

  • Click the Pause/Start button to pause the selected job. To resume it, click the button again.
  • Click or hold down the Add button to add a new job. See Rendering images and Rendering parameter files.
  • Click the Delete button to cancel and delete the selected job.

The icons before each job in the list show its type (single image or parameter file), and whether it is currently calculating.

By default, only the job at the top is calculating. When it is finished, the next job in the queue is started. New jobs are added at the bottom, and therefore will be started automatically when all the other jobs have been completed.

To start another job, select a job in the list that is not calculating and click the Pause/Start button to start it. When this job is finished, it will start the next job in the queue, too.

You can reorder the jobs in the queue by dragging them up or down to adjust the order in which they will be calculated. For example, if you want a job to stay paused while the other jobs are calculated, drag it to the top of the list, so it will not be started automatically.


  • To get help on a specific statistic, hover the mouse cursor over it while the Fractal Mode tool window is open.
  • When you hide or close the tool window, the jobs will continue to calculate in the background. When you close Ultra Fractal, the jobs will be paused. They will be resumed automatically when you start Ultra Fractal again.
  • Although Ultra Fractal is carefully designed to resume jobs correctly in case of a power failure or computer crash, you may want to back up time-consuming render jobs to be absolutely safe. To back up a render job, right-click it in the list and click Backup Job. This will save all calculated data to a single file (*.urj). To restore a job, hold down the Add button and click Restore Job.

Next: Anti-aliasing

See Also
Exporting and rendering

Render jobs