Variation in f_trap as a function of ﹩{L}_{{\rm{F2100W}}}/{L}_{{\rm{H}}\alpha }^{{\rm{corr}}}﹩, which roughly captures the shape of the SED (left panel) and attenuation A_Hα, with corresponding ﹩\mathrm{log}\unicode{8210}\mathrm{log}﹩ bisector fits (solid black line). Individual regions are shown as gray background points, and density contours represent the 16th–25th–50th–75th–84th percentile distributions colored by local environment—galaxy centers (yellow), spiral arms (blue), inter-arm regions (red). Brown contours show the distribution of ﹩0\mathop{.}\limits^{^{\prime\prime} }9﹩ pixel-scale MUSE estimates in galaxy centers. f_trap shows a tight empirical correlation with ﹩{L}_{{\rm{F2100W}}}/{L}_{{\rm{H}}\alpha }^{{\rm{corr}}}﹩, and shows much more scatter with attenuation. The gray shaded area shows the region where the direct and reprocessed radiation pressure terms are within 1 dex of each other, around the dashed gray line where f_trap = 1. The Spearman rank coefficient ρ for the full sample of regions is included.