Distribution of ﹩{\delta }_{F}^{{\rm{w}}}﹩ values from Wiener-filtered Lyα absorption maps in the CLAMATO field. The orange histogram is the distribution of different realizations from the COSTCO-FGPA reconstructions, while the blue histogram is for the actual CLAMATO data. The distributions agree reasonably well in the low-transmission regime (﹩{\delta }_{F}^{{\rm{w}}}\lesssim 0﹩), which traces overdensities.