I've been having problems with what I believe are artifacts. They seem to have some connection with function settings, particularly exp, and cotan, cotanh, tan, tanh, cos, cosh, sin, sinh.

Here's an example from om.ulb, featuring a transform which maps according to various combinations of functions:

5e401fb7c501d.jpg

artifact1 {
fractal:
  title="artifact1" width=1024 height=768 layers=1
  credits="Otto Magus;2/9/2020"
layer:
  caption="Background" opacity=100
mapping:
  center=1.56640625/0.015625 magn=3.6571429 transforms=1
transform:
  filename="Standard.uxf" entry="GenericTransform"
  p_transformClass="om.ulb:OM_FunctionsTransform"
  p_transformClass.v_generic=100 p_transformClass.v_transform=100
  p_transformClass.v_usertransform=100 p_transformClass.version=100
  p_transformClass.f1=secsec p_transformClass.f2=cosccosc
  p_transformClass.f3="recip(flip(exsec/excosec))"
  p_transformClass.p1=1/0 p_transformClass.p2=0/0
  p_transformClass.pow=1
formula:
  maxiter=100 filename="Standard.ufm" entry="Julia" p_seed=-1.25/0
  p_power=2/0 p_bailout=4.0
inside:
  transfer=linear filename="Standard.ucl"
  entry="GenericGradientColoring"
  p_coloringClass="Standard.ulb:Standard_Smooth"
  p_coloringClass.v_generic=100 p_coloringClass.v_coloring=100
  p_coloringClass.v_gradientcoloring=100 p_coloringClass.power=2/0
  p_coloringClass.bailout=128.0
outside:
  transfer=linear filename="Standard.ucl"
  entry="GenericGradientColoring"
  p_coloringClass="Standard.ulb:Standard_Smooth"
  p_coloringClass.v_generic=100 p_coloringClass.v_coloring=100
  p_coloringClass.v_gradientcoloring=100 p_coloringClass.power=2/0
  p_coloringClass.bailout=128.0
gradient:
  smooth=yes index=0 color=8716288 index=100 color=16121855 index=200
  color=46591 index=300 color=156
opacity:
  smooth=no index=0 opacity=255
}

And here's an example from ikm.ufm, featuring the formula "Newton's Method for exp(z) = log(z)". Here, the exp function could be the cause:

5e402026e2662.jpg


artifact2 {
fractal:
  title="artifact2" width=1024 height=768 layers=1
  credits="Otto Magus;2/9/2020"
layer:
  caption="Background" opacity=100
mapping:
  center=-1.93359375/-0.69921875 magn=9.1428571
formula:
  maxiter=100 percheck=off filename="lkm.ufm" entry="explog-newton"
  p_bailout=100.0
inside:
  transfer=linear filename="Standard.ucl" entry="OrbitTraps"
  p_trapshape=lines p_diameter=1.0 p_traporder=4.0 p_trapfreq=1.0
  p_trapcolor=iteration p_traptype=closest p_threshold=0.25
  p_trapcenter=0/0 p_aspect=1.0 p_angle=0.0 p_solidcolor=no
outside:
  transfer=sqrt filename="Standard.ucl" entry="OrbitTraps"
  p_trapshape=lines p_diameter=1.0 p_traporder=4.0 p_trapfreq=1.0
  p_trapcolor=iteration p_traptype=closest p_threshold=0.25
  p_trapcenter=0/0 p_aspect=1.0 p_angle=0.0 p_solidcolor=no
gradient:
  smooth=yes index=0 color=8716288 index=100 color=16121855 index=200
  color=46591 index=300 color=156
opacity:
  smooth=no index=0 opacity=255
}

Does anyone here know how to correct this? Any info would be gratefully received!

I've been having problems with what I believe are artifacts. They seem to have some connection with function settings, particularly exp, and cotan, cotanh, tan, tanh, cos, cosh, sin, sinh. Here's an example from om.ulb, featuring a transform which maps according to various combinations of functions: ![5e401fb7c501d.jpg](serve/attachment&path=5e401fb7c501d.jpg) ```` artifact1 { fractal: title="artifact1" width=1024 height=768 layers=1 credits="Otto Magus;2/9/2020" layer: caption="Background" opacity=100 mapping: center=1.56640625/0.015625 magn=3.6571429 transforms=1 transform: filename="Standard.uxf" entry="GenericTransform" p_transformClass="om.ulb:OM_FunctionsTransform" p_transformClass.v_generic=100 p_transformClass.v_transform=100 p_transformClass.v_usertransform=100 p_transformClass.version=100 p_transformClass.f1=secsec p_transformClass.f2=cosccosc p_transformClass.f3="recip(flip(exsec/excosec))" p_transformClass.p1=1/0 p_transformClass.p2=0/0 p_transformClass.pow=1 formula: maxiter=100 filename="Standard.ufm" entry="Julia" p_seed=-1.25/0 p_power=2/0 p_bailout=4.0 inside: transfer=linear filename="Standard.ucl" entry="GenericGradientColoring" p_coloringClass="Standard.ulb:Standard_Smooth" p_coloringClass.v_generic=100 p_coloringClass.v_coloring=100 p_coloringClass.v_gradientcoloring=100 p_coloringClass.power=2/0 p_coloringClass.bailout=128.0 outside: transfer=linear filename="Standard.ucl" entry="GenericGradientColoring" p_coloringClass="Standard.ulb:Standard_Smooth" p_coloringClass.v_generic=100 p_coloringClass.v_coloring=100 p_coloringClass.v_gradientcoloring=100 p_coloringClass.power=2/0 p_coloringClass.bailout=128.0 gradient: smooth=yes index=0 color=8716288 index=100 color=16121855 index=200 color=46591 index=300 color=156 opacity: smooth=no index=0 opacity=255 } ```` And here's an example from ikm.ufm, featuring the formula "Newton's Method for exp(z) = log(z)". Here, the exp function could be the cause: ![5e402026e2662.jpg](serve/attachment&path=5e402026e2662.jpg) ```` artifact2 { fractal: title="artifact2" width=1024 height=768 layers=1 credits="Otto Magus;2/9/2020" layer: caption="Background" opacity=100 mapping: center=-1.93359375/-0.69921875 magn=9.1428571 formula: maxiter=100 percheck=off filename="lkm.ufm" entry="explog-newton" p_bailout=100.0 inside: transfer=linear filename="Standard.ucl" entry="OrbitTraps" p_trapshape=lines p_diameter=1.0 p_traporder=4.0 p_trapfreq=1.0 p_trapcolor=iteration p_traptype=closest p_threshold=0.25 p_trapcenter=0/0 p_aspect=1.0 p_angle=0.0 p_solidcolor=no outside: transfer=sqrt filename="Standard.ucl" entry="OrbitTraps" p_trapshape=lines p_diameter=1.0 p_traporder=4.0 p_trapfreq=1.0 p_trapcolor=iteration p_traptype=closest p_threshold=0.25 p_trapcenter=0/0 p_aspect=1.0 p_angle=0.0 p_solidcolor=no gradient: smooth=yes index=0 color=8716288 index=100 color=16121855 index=200 color=46591 index=300 color=156 opacity: smooth=no index=0 opacity=255 } ```` Does anyone here know how to correct this? Any info would be gratefully received!
 
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Hi Otto,

Most likely it's caused by an invalid input value for one of the trigonometric functions that you use in your transformation. You could zoom into one of the "blobs" so it covers the entire screen, and use the print function to print what's going on inside your transformation:
https://www.ultrafractal.com/help/writing/tips/debugging.html

Hi Otto, Most likely it's caused by an invalid input value for one of the trigonometric functions that you use in your transformation. You could zoom into one of the "blobs" so it covers the entire screen, and use the print function to print what's going on inside your transformation: https://www.ultrafractal.com/help/writing/tips/debugging.html

Ultra Fractal author

 
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