Program ex8techdemo lists the following depth levels (I grouped them by depth level as some appear at the same depth):
1024
960
896
832
768
704
640
576
512
448
384
320
256
192
128
64
0
-64
-128
192
256
Which would be 8 depth levels in total. With some trial and error I found that there are 11 levels:
538-1024
266-537
106-265
1-105
0
-1 to -74
-75 to -130
-131 to -173
-174 to -208
-209 to -236
-237 to -256
I did this all with locate x,y,z: print
Also within the ranges, a depth at the high end of a range vs a low end if the same range with appear at different depths depending on the position of the 3d slider. I did all my tests with the slider all the way up. Just thought I'd post this all in case it helps anyone. Let me know what you think or if you have anything to add!