How to render SMPLX front and back normal if I konw the camera parameters KRT and SMPLX parameters?

[fishfishson]

Dear author,

I want to test your normal net performance with my custom multiview data. Since I have already konwn the camera parameters and SMPLX parameters of the captured human, could you pls tell me how to render the SMPLX normal so that the results are consistent with yours?