Strange Blurriness

[Chillheimer]

hi kalle!

please take a look at the attached images and the kfr file.
do you have any idea where the blurriness comes from?
there seems to be something wrong - when zooming deeper you can find no more details, just blur..

it happens reproducably when you open the kfr and change the image size to e.g. 2048
happens in 2.7 and 2.63

I'm about to do some parallel-zooms, where just one decision ist different in the beginning to explore what consequences that one decision has when zooming in deeper.
 
In the first picture you see the different locations
the second shows the zoom into area "1"
the third shows the zoom into area "2"

[Kalles Fraktaler]

I think it may be a precision issue.
Mandelbrot fractals fail to be rendered at about e13 when only double precision is used, but it often get distorted earlier, depending on the location, e11-e12.
Kalles Fraktaler uses reference point <0,0i> until e10, so the effect is that only double precision is used up to that zoom level.
But with the very large image size you are using, it might be that the precision issue appears already at e7, because it is still the perturbation formula that is used, so it is not the plain z=z^2+c

[Chillheimer]

didn't understand a lot of what you said..
but checking "special/no approximation" worked to give a clear image..

[Kalles Fraktaler]

didn't understand a lot of what you said..
but checking "special/no approximation" worked to give a clear image..

Thanks. My assumption was wrong but now I know how to solve it