ceramic-a-sm.pgm: ceramic-a.pgm.gz
	zcat ceramic-a.pgm.gz \
	  | ppmtopgm | pnmscale 0.1 | pnmdepth 255 \
	  > ceramic-a-sm.pgm

ceramic-b-sm.pgm: ceramic-b.pgm.gz
	zcat ceramic-b.pgm.gz \
	  | ppmtopgm | pnmscale 0.1 | pnmdepth 255 \
	  > ceramic-b-sm.pgm

ceramic-c-sm.pgm: ceramic-c.pgm.gz
	zcat ceramic-c.pgm.gz \
	  | ppmtopgm | pnmscale 0.1 | pnmdepth 255 \
	  > ceramic-c-sm.pgm

ceramic-d-sm.pgm: ceramic-d.pgm.gz
	zcat ceramic-d.pgm.gz \
	  | ppmtopgm | pnmscale 0.1 | pnmdepth 255 \
	  > ceramic-d-sm.pgm