one of three comps not showing....

[stylus]

hi, thanks for taking a look at this.  i have three compositions laid across the frame.  they are identical in their properties, unless i've missed something, yet one doesn't show up in classic 3d.  it shows up in cinima4d, and the ray tracer, but not in classic 3d.

how have i been stupid here?  what have i missed?  thanks so much.  d.

[Roei Tzoref]

show us a full screenshot of your Ae interface. type UU on the layers in your timeline so we can see all the modified properties.

[stylus]

here is a dropbox link to the screen shot.  the three layers are highlighted.  they have no special keyframes on them.

https://www.dropbox.com/s/hv7uut0v30qwth3/aftereffects_02.jpg?dl=0

[stylus · Accepted solution]

so i have part of it.  i have a backdrop, "tan stained paper texture", it is clearly in the far background.  all three stills layers are in front of it.  two of them show up but the other won't 'til i move the paper texture layer below all three stills layers on the timeline.  then it shows the missing layer.  why would only one be missing?  and what difference does it make if, when working in 3d, all the layers are arranged correctly in space?  hummmm.

thanks guys, i can work from here, though i would love someone to explain what's going on.  d.