[away3d] [Away3D] sprite2d deltaZ

[Stephen Hopkins]

I have a crosshair sprite that is always 20 units from my ship But I
want it to always show up(the ship or nothing else can hide it. I
tried setting the deltaZ to be negative but it only made my sprite
closer to the camera/bigger rather than putting it on top of
everything else. Is that what deltaZ is supposed to do?