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when passing parameters from the 3D nav to the main program often the DE stop are modified without a apparent reason, for "modified" i intended dramatically multiplied many times (i.e, from 2.5 to 327 )
 going up
But the what surprised me more is that sometimes the numeric value disappear, replaced by "NAN"

what means "NAN" ?

For what i saw has a devastating effect on rendering time, after pressing "Calculate 3D" i saw the time counter going up to more the 4h (previous render with same formula and size was 35m )

At soon i noticed i stopped the calculation, inserted manually a DE stop value, and the render went well and tooks less then 20 minutes.

Another issue i saw with the NAV is that sometimes when moving the "far plane" distance...changes by itself without apparent reason and should be manually reset

The program is great i really love it so those are not critiques just i am curious to know if there is a reason for this weird changes, what "NAN" means, and if are know issues and if there is a way to prevent them (the only i found is take care to check
for weird and unplanned changes in the "far plane" and DE stop" value, and in case correct them manually )

In both cases it does!

well not always but often, i would not know how to replicate because i have no idea of what may be the cause , but happened to me already 3 times today

PS i noticed only now that this topic (as i suppose the previous we replied) is misplaced:
it was intended to be in the Mandelbulb3d board because are question specific for M3D

...maybe some mod may fix ?  

NAN = Not a number. Jesse forgot some additional checks. Did you Jessie?

DE stop is scaling proportional to the render resolution if the "DE stop + C" checkbox is on.

For example: If you press "Parameter" in the navigator window, double the resolution in the main window and press the "view to main" navi-button afterwards you will get a wrong DE stop value. And if you scale up and down and swap parameters, it behaves exponentially and can give you DE stop values from hundreds till N(ot)A N(umber). This might be the same with far plane values .. didn't test it.

Just press the "Parameter" button in the navigator each time you change the resolution or DE.