Wehn I was using xnalara models in daz, all i did was import them into blender smooth them out and when you export you waana click selection only (make sure all the part of the model is selected.....
the you want material gropus and and polygons and normals
then export them i the folder....in daz import the model and import them as a blender file and have the middle axis to the y axis
At first I thought the presets change the Shadow Bias but I found out that they don't. The presets just adjust the samples but the Shadow bias is constant on all presets. user needs to adjust it manually.