Comparison of the disk dust mass from a grid of 1728 models versus the mass derived from flux for the same models. In the top panel, stellar luminosity and effective temperature are fixed, illustrating how disk radius varies with flux and dust mass (see the colorbar with the radius values). The bottom panel shows the effect of changing stellar luminosity while keeping the disk radius and effective temperature constant. The dotted gray line highlights the masses from the flux that equal the disk dust mass introduced in the models.