Hi brynn,hjalle and llogg
thanks for your reply.
I don't use "Tiled Clone".
I have made a extension that replaced each pixels of picture to dot shapes,
changing the size by strength of pixel color.
In this method when the dot size is bigger, drawing size is bigger, but keeping the resolution.
At the "Tiled Clone", drawing size don't change, but the resolution decreases.
Adding a related work, Einstein derived from line shapes.
In this time, changing the width of slant by strength of pixel color.

svgfile(1.8MB):
http://dp48069596.lolipop.jp/sd/img/img_inkscape/einstein_lines.svg