722 posted at 7:28 PM Wed, 12 April 2023 - #4461971

ok so it look like no matter what set the render sample its only render 1 sample  or 30 out of a 100  ??????

According to the manual (you'd think a former electronic service technician would read those more often!),  Adaptive Sampling is a way to speed up render times.  When it detects that additional sampling will make little or no difference, according to the threshold WE set, it simply halts the render. This way, you get a good quality render while not having to render unnecessary samples if the extra samples won't make much additional improvement.  A setting of .050 lets you do a quick and dirty render to see if the scene "works" for you, without doing a full render.  A setting of .010 does a more meticulous job.  So does a setting of .005, at the cost of longer rendering times, of course.  A setting of .000 apparently is the equivalent of turning it off. 

Edited to add:  a setting of .0001 is apparently the same as entering zero, as it ran all of the samples.