!!Art Update!!
i add Art button to see my pictures.
How to smooth pictures:
Steep 1 Export a reference picture , Custom Good the color And Use the Grid filter (The Smart Smooth no are important)
Ad adaptative , if the image have bad qualty put Even .
step 2 redraw: With the reference edit the image This may take hours since it's basically your drawing, not a copy.
steep 3 Put the picture on the card With medium size.
Set the Move layer to 0.5% ,
Set the transparency 0.25 , duply as art (Lit draw)