Calculation details
Ultra Fractal is fully multi threaded and can take advantage of multi processor computers to speed 
up fractal calculations. This is done by splitting the fractal to multiple parts so the processors can 
work on each part in parallel. You can even distribute calculations to other computers with the 
network calculations
 feature.
This works well with most Mandelbrot type fractals, where each pixel of the fractal can be calculated 
independently. However, with fractal types such as IFS and Flame Fractals [1], the entire image is 
calculated in one step and it cannot be subdivided. Therefore, multiple processors and network 
calculations will not speed up these fractal types. In Ultra Fractal 3, 
rendering
 these fractal types was 
not recommended, but that limitation does not apply anymore.
If you have a processor with HyperThreading, Ultra Fractal will recognize it as a dual processor and 
split up its calculations accordingly. In most cases, this will result in a modest speed improvement. 
Otherwise, you can force Ultra Fractal to use just one processor.
Open the 
Options dialog
 and go to the Fractal tab. In the Advanced calculation options area, the 
Minimum number of threads option sets the minimum number of threads that Ultra Fractal will 
use for a single fractal window. If this is set to 1, calculations will not be subdivided. Typically, this 
should be set to the number of processors on your computer. 
The Maximum number of threads option limits the number of threads for a fractal window. Ultra 
Fractal uses the minimum number of threads for each layer, subdividing calculations as necessary, 
until the maximum number of threads is reached. This ensures that complex fractals with many 
layers will not saturate the system by using too many threads. If you would like more layers to be 
calculated simultaneously, you can increase this setting.
[1] To use IFS and Flame Fractals, you first need to download the set of 
public formulas
 from the 
online formula database. Select Pixel in mt.ufm as the 
fractal formula
 and either Iterated 
Function Systems in mt.ucl, or Flame Fractals in enr.ucl as the outside 
coloring algorithm
.
Next: 
Default fractal
See Also
Fractal windows
Playing animations
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