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Xnormal does 2 things (basically).

1) Creates Normal maps of both types (tangent and world space).

to see these in wings would require that the viewport renderer be re-written to include OpenGL support of rendering the effect of normal maps (bump maps.) It currently does not.

2) Creates displacement maps. I'm not sure, but I think xNormal can create 8-bit grayscale displacement maps. However, nobody I know uses 8-bit disp. maps. The use 16-bit disp maps for higher resolution displacement.

Micheus would have to re-write his plug-in to support 16-bit grayscale disp. Standard 8-bit grayscale does not hold enough detail for good displacement.
Not to mention that good displacement requires a heavily tessellated mesh.

I'm not saying it isnt't possible, but its not that straight forward.