Here's a utility script for DS that can export Poser MATs, much like ShaderSpider.
The script will translate settings all normal DAZ shader settings over to Poser. If you're using displacement in DS, your displacement will be translated to Poser 5/6. The "Lighting Model" property is the only common property that will not be translated.
Read on for instructions on how to install and use the exporter.
Unzip the file to any DAZ|Studio content directory.
1) Select a figure or prop.
2) Select any number of surfaces on that figure or prop. These are the materials that will be included in the MAT(s).
3) Run the "Export Poser Materials" script, found in Scripts / Utilities.
4) Choose which Poser version MATs you want exported (P4, PP, P5, P6), whether or not thumbnails should be saved and whether or not file paths should be cleaned up.
5) Choose a base file name. (ie, "null" will result in "null_P4.pz2", "null_PP.pz2", "null_P5.pz2" and "null_P6.mc6")