Foot issue on mecanim animation

Hi there, I have a little problem with a daz character imported via 3d Xchange into Unity.

With just an idle animation, my character have his shoes not exactly targeting the feet...
I can see the feet going out of the shoes sometimes,

Any idea on how to resolve that ?

 

It's probably a skinning issue. Your shoe's skin weights are probably not painted correctly. Unity does some sort of optimization on the skin weights during import. What looks correct in the source program may not look quite right in unity. Insure that you don't have any unnecessary joints assigned to the shoe mesh and make sure that there aren't even fractions of a percent of weight assigned to the wrong bone.