Re-Importing Model empty / Texture Re-Projection

I am exporting a model with the rc info file, and then bringing it into 3D/Max. Reduce the poly-count, overwrite the file again, and then import it into Realitycapture. Now the model is not visible… If I import after export, it works, but if I send it through 3D/Max and save it again, it is just a blank space. It tells me the object has 2M tris, the same as I can read in 3D-Max after reducing the poly count.
What am I missing here?

Hi Cai_ZhiYuan,
what are your import model settings? Do you have RCINFO file also for corrected model? Have you followed this: RealityCapture Help?
Is it possible that the coordiantes of the model were changed?