Sunshaft culling somehow inverted?

Hi Everyone, Im new to unity, so forgive me if this is obvious.

I am trying to get Sunshafts to work inside a scene where the sky is a giant sphere with several cloud spheres inside it, all above my terrain with the directional light outside of the spheres.

With Sunshafts on "Rely of Z Buffer" the sphere blocks all shafts. Turning off this option enabled the shafts, but instead of the game objects blocking the shafts, the shafts only appear through the objects (as if the objects where stamped onto the sphere, and then cut out of it.



In this image, when I turn of the sky sphere and turn on rely on Z buffer. the sunshafts come through that gap between the objects, instead of coming through the objects around the gap.

--edit-- Here is an image with the intensity of the shafts at an idiotic number so you can really see the issue




I have absolutely no idea what is going on.