Papervision vs Sandy

After reading Sandy 3D's code and tutorials I found that I liked the organization of the code leagues better than Papervision 3D (which I have more experience in at this point). So I decided to do a little test.

In the past hour I wrote the same basic thing in both engines. Other than some features that one had and the other didn't (neither seemed to have a useful concept of 'lighting' - but in the Papervision case I'd already written my own primitive Lambertian reflectance shader so I just reused that), one thing I noticed was that both of them had problems with z-index culling - putting one triangle on top of another that shouldn't be.

I did a lot of reading on Sandy and tried all combinations of their culling and didn't manage to solve it. Only thing I could find in Papervision is an arbitrary z-depth sort for objects for the camera.

P.S. If this example looks familiar to you it's no mistake - I'm actively dreaming these days of making a Final Fantasy Tactics style game in full 3D (not just iso) in flash.

Sandy Example
Papervision Example

Also, the Papervision performs notably better. So as much as I like the structure of Sandy better I may not be using it as soon as I'd like.