Dependences (gray lines) between the measured count rates for the polarized flux of the disk, Q_ϕ, of RX J1604 and the stellar intensity in the halo, I_halo, for (a) the six R band cycles from June 11, 2015, (b) the 37 J band cycles from the eight nights in August and September 2017, and (c) the seven H band cycles from July 1, 2016. The dotted blue line in (c) represents a direct proportionality Q_ϕ = 0.54I_halo as expected for transmission variations caused by clouds.