Image will not render

[Bent-Winged Angel]

I have a fractal that just will not render. After about 15-20 min? it will go blank with just one light dot in center.   Tried making several adjustments but no go.. 

[Sockratease]

In chaoscope we are using Strange Attractors.  Some vanish at higher iterations (but it usually posts a warning like "No attractor after "X" iterations).

Try lowering the iterations...

[hyperben2]

It depends on formula and iteration rate. Julia quaternions are more special, as one half can disappear in preview mode when level is greater than 15. (disabling auto-adjust is the key, the vanished half come usually back while rendering). However, rendering time can be very long, some took me over 2 hours with highest iteration rate.

It can also depend on settings, when those are really close to limits (error message appears). Preview shows a curious shape or something near, but when you start rendering, nothing comes.

[Bent-Winged Angel]

hmmm all interesting replies!  It seems that the more finer detailed the image is the less likely it will render. Tried higher & lower.  Auto adjust & manual.. ( not sure doing it right) but continue to experiment.  Trial & error.  I did get one done with eliminating the color & lighht variances. Got the detail but really boring. Maybe my pc just can't handle the detail?  Once again I feel like GOLDYLOCKS!  (My old business name)    Just right is out there somewhere....

[Bent-Winged Angel]

Actually this is similar to the image I was trying to render in Chaoscope; thing is I made it in ChaosPro!

http://www.fractalforums.com/gallery/2/1953_10_05_10_10_21_07.jpeg

[Bent-Winged Angel]

In chaoscope we are using Strange Attractors.  Some vanish at higher iterations (but it usually posts a warning like "No attractor after "X" iterations).

Try lowering the iterations...

I found that in lowering iterations I would usually lose "detail"

[Sockratease]

Can you post the file?

If it wont attach due to format, just open it with a text editor, then copy and paste here!

[Bent-Winged Angel]

Like this??


info {
   version "0.3.1"
   author "Owner"
   date "29/04/2010"
}
attractor {
   type pickover
   iterations 4294967295
   parameters <-1.62962962962963, 1.05555555555556, 0.518518518518518, 1.22222222222222>
   exclude <0, 1, 2, 3>
}
view {
   mode plasma
   width 1024
   height 768
   scale 0.210801886792453
   model_scale 1.66779924422322
   origin <0.439646763969838, -0.573923283452553, 0.388097088496683>
   translation <0.00191109854772365, -0.0199555821636983, 0>
   rotation <-0.0724142760727388, 0.905087186858602, 0.419014745331526, 2.62439501299324>
   peak 0
   gamma 2
   brightness 4
   gradient {
      variable speed
      colors <0, 1, 0, 0,
              0.16666667163372, 1, 1, 0,
              0.333333343267441, 0, 1, 0,
              0.5, 0, 1, 1,
              0.666666686534882, 0, 0, 1,
              0.833333313465118, 1, 0, 1,
              1, 1, 0, 0>
   }
   gradient {
      variable angle
      colors <0, 0, 0, 0,
              1, 0.501960813999176, 0.501960813999176, 0.501960813999176>
   }
}

[hyperben2]

As I tought, you are very close to a "limit", the formula looks like a Pringle (sour cream -onion flavour^^). The pickover chips appears only in preview mode, a central dot appears after rendering. For testing renders, you should low iteration rate and maximise it only when you're sure of what you want. Time is precious^^

I tweaked it a little (A to -3, B to 0, C to -3 and D to 0, all cursors on left), if you do as me, you should normally obtain a shape like this



And do not forget to low the iteration rate for test, it's enormous !

[Bent-Winged Angel]

As I tought, you are very close to a "limit", the formula looks like a Pringle (sour cream -onion flavour^^). The pickover chips appears only in preview mode, a central dot appears after rendering. For testing renders, you should low iteration rate and maximise it only when you're sure of what you want. Time is precious^^

I tweaked it a little (A to -3, B to 0, C to -3 and D to 0, all cursors on left), if you do as me, you should normally obtain a shape like this

<Quoted Image Removed>

And do not forget to low the iteration rate for test, it's enormous !

Love the analogy! lol  1st of all I'm REALLY CONFUSED being that your image looks NOTHING like mine. 

From the Chascope manual...Preview
Simple preview: Enable it if the enhanced preview causes problem. When enabled, the preview reverts to a more basic method common to all rendering modes.
Iterations: Number of points displayed by default. Depending on the computer speed, the full set of points may fade in after being calculated in the background.
Minimum Iterations: Minimum number of points Chaoscope will calculate before the preview is updated.
Maximum Iterations: When Scale is greater than 1, Chaoscope adds points to keep the density constant. Maximum Iterations sets a limit to how many points will be added.

I have tried "simple preview" & even that will not render.  I have gotten a few slightly saimpler ones to render; soo as you mentioned could be "close to limit?"  I have "played with all settings.. Typing in iteration in preview, leaving it alone, etc.  Never had this issue with ChoasPro.  My only other experience with fractal programs.

[hyperben2]

very curious. I never had any problem with Chaoscope. Does it happen with all formulas or just with pickover ones ?

The limit I mentionned is when the shape in preview reduce to a spiral of dots (in Pickover case) then a single dot or a white screen which means overflow or something like that.


Maybe you should try to remove and reinstall chaoscope, a classic alternative solution...

[Bent-Winged Angel]

very curious. I never had any problem with Chaoscope. Does it happen with all formulas or just with pickover ones ?

The limit I mentionned is when the shape in preview reduce to a spiral of dots (in Pickover case) then a single dot or a white screen which means overflow or something like that.


Maybe you should try to remove and reinstall chaoscope, a classic alternative solution...

Not just "pickover"  I can recreate that image with most.  Reinstal?  might not be a bad idea, had done that previously with WMM & it was a success.

[Bent-Winged Angel]

It seems to be that if (under the actractor window it says a an iterations # of 4294967295)  it cannot be rendered under any surcumstances.  Just a way of teasing & tormenting me! Nothing higher than 20000000.  Does the personal PC or graphics card make a difference?

[hyperben2]

Maybe your hardware is the main limit to your creativity (with chaoscope). I can render a fractal with max iteration rate, but it will take between 2-3 hours for a standard 1280/1024 image. With a good laptop (but not enough for Tacitus, Incendia, mandelbulber....)

[Bent-Winged Angel]

That's probably right!  My PC will try to render up to about 1:42 min.?  but loses it after 2o min. Iteration gets dramatically lowered.  Have had no problems with ChasPro.  But I do have to admit I've learned more from this defeat.  (as with everything in life)