Problem with 3d, vanishing point?

Hi,

I am having a first attempt at creating a 3d movie. I have decided to give the 3d features in FP10 a go, even though I have heard there are problems with it.

I put my array of movieClips on the stage with this code

tempClip.x = 100;
tempClip.y = 100;
tempClip.z =  i *50;

itterating through and bringing them forward in the z-axis. I get the effect in the screenshot attached. This is not what I expected as I can see the images behind the image at the front.

How do I sort this with actionscript 3? Is this due to perspective or vanishing point?