RTF is a global modification that replaces all towns in the game.

It's all very strange... I looked at the file, the neck and body are broken, but the eyes seem to be okay, and the dress too... I initially thought that maybe I cut the body and didn't close the holes with polygons, and that's what caused it... but the eyes also have a hole in the back, there are no polygons, so it's not that... and the eyes have small triangles... and then, if the number of polygons affects it, why is the neck broken? There are few polygons there... it's a mystery... maybe someone on the forum has information on this issue?

And when you reduced the model, did you apply transformations? Did you reset the scaling?
It's unlikely that this affects it, because only part of the models are broken.