I have an working example that is working perfectly.
But the others no.
Please, see better the other post. He is saying the contrary from you.
Dimensions=0.3 in all directions
[0.0068103056, -0.049634278, 0.050176658, 1.9247658, 3.810626, 2.4928436]
PreRegistration Images (ROI)
PosRegistration Images (ROI)
The point in the corner is (0,0,0). If the faces are facing you, to inside the screen is Z, for downwards is X and for the side is Y.
The image with flat nose is the fixed image.
In the result registration image the inside has several levels of grey or color that was applied a threshold to attest the good or not good registration.