QUIDS is a Python package for generating synthetic Stokes Q and U polarization maps using 3D dust density and Galactic Magnetic Field (GMF) shell data. It integrates polarized emission over log-spaced spherical shells, with polarization angles derived from GMF models such as UF23 or JF12. The goal is to explore whether small-scale structures in the GMF and dust distribution can reconstruct or preserve the large-scale polarization patterns observed across the sky. This package is particularly relevant for modeling and probing how local Galactic features contribute to or interfere with global polarization signals.