Distance shader not working with spherical camera?

[foy]

Can anyone get the distance shader with spherical setting to work with the spherical camera?

I can get the z distance function to work, albeit with undesirable results. I am having no luck with the spherical setting, it appears to do nothing. Can anyone else confirm this  potential issue?

[cyphyr]

Works for me

[digitalguru]

as an alternative, it would be great if the Distance shader could use a Null to position it,

if I use a few distance shaders in the scene all I see is cameras :-)