Dodecahedron not unfolding with correct ratios.

[wakass]

Dodecahedron not unfolding with correct ratios.

[addam]

As far as I can tell, the angles and length are all correct. If you enable the Display Stretch overlay, it shows nothing noticeable:

I would close this, assuming the skewed polygon is just an optical illusion. Do you have any measurement to assure there is an actual distortion?

[addam]

Can you please send me the blend file? It seems quite improbable that the script would produce incorrect shapes but if true, it would be a serious bug.

[wakass]

Please find attached the blend file. It does seem a bit odd, but i'm finding comparable results using the regular UV unwrap (which i think paper model might rely on?) Correct unwrapping seems to happen only when using unwrap 'project from view' with the viewport is aligned to the face normal.

dodecahedron_unfold_test.blend.zip

[addam]

Also, overlaying the screenshot from 3D View with the screenshot of UV editor shows that they are exactly the same shape:

[wakass]

You are completely correct.. this is definitely an optical "illusion". Thanks for looking into this and elucidating the issue!

Regards