Left panels: Examples of complex and filamentary Galactic cirri surrounding NGC 918 (panel A) and NGC 2634 (panel B) revealed in deep images obtained with Planewave RC 0.6-m f/6.5 and Planewave 0.42-m f/6.8 telescopes, respectively. NGC 2634 also shows shell-like tidal features with similar shapes and widths that are almost indistinguishable from the Galactic dust features. The FOV of these images are 20′ × 20′ and 30′ × 30′, respectively. Right panel: Deep image of the tidal stream around Messier 63 obtained with the Takahashi FSQ106EDX f/5 telescope. A wide-field SFD dust map of this sky region (Schlegel et al. 1998; Schlafly & Finkbeiner 2011) is shown in the bottom-right inset panel, with the corresponding FOV marked with a square. Comparison of our luminance filter image with this Galactic dust map shows that the low-surface brightness overdensity (marked as OV) situated at 35′ NW of the galaxy is the brightest part of a cirrus filament, appearing as an isolated round over-density due to the surface brightness cutoff of our luminance image.