OOOps, I was wrong, and so Nate was. I got a reply on the Corona forums from (I guess) a Corona developer:
"Nate is clearly talking without specific knowledge of Corona - so as it stands I'm still confidant that I'm correct.
That does not mean Corona won't make some changes (indeed, I've talked with Walter about this, and we both hope that a way can be found), but as it stands, Spline won't work.
It isn't the subdividing that is the problem (you just use an image sheet to generate the slices and stick them next to each other), it is the deformation. You can make the outer edge of an image any shape you want, but it is the internal deformation, as done by OGL, that is the issue.
I'll try to give an example:
Say you have an image.
You split it, using imagesheets and sprites, into a left half and a right half.
You now create 2 sprites, one from each half, and position them on screen, so you are looking at the whole image again.
Now, you want to deform this image along the middle line (IE the right hand edge of the left slice, and the left hand edge of the right slice).
You can indeed do this fine using the .path property, and as long as you move the 'paired' points on each image the same amount, it'll be 'fine'.
OK now, so far so good.
Now, move one of the other corners. IE from the left edge of the left half, or the right edge of the right half.
This is where it goes wrong.
The joined edge in the middle will now look wrong. The two halves won't match up, breaking the single image 'look' of the two sprites.
This is because of the perspective distortion. I have an example here:
lvvgL8d.jpg
Note how the edge between the two floor tiles doesn't match up, despite the smaller squares all being the same size? This is because of the perspective effect. THIS is what currently goes wrong, and prevents Spine from doing what it claims - or rather, doing it without large graphical glitches.
It isn't Nate or anyone lying, it is just them not understanding the current (and I stress 'current') limitations placed on quad distortions by Corona / OGL. I won't argue more here as frankly I'm ambivalent about the whole Spine thing, but if I find time I'll knock up a small demo to illustrate the point. Just do bear in mind that the Spine guys are talking about Corona without actually having looked at G2 and its capabilities and limitations.
"
Bad luck for me, will try another SDK...