This is about objects, not motifs. The photo is only a substitute for an object; it is unsuitable as a picture in its customary sense.
No rules, however wise, are a substitute for affection and tact.
You must go or send a substitute.
Process is not a substitute for skill.
Drunkenness is never anything but a substitute for happiness.
Education is no substitute for intelligence.
Satyagraha has been designed as an effective substitute for violence.
Nutritional supplements are not a substitute for a nutritionally balanced diet.
Brains are no substitute for judgement.
She may be cute, but she's just a substitute.
I have struggled against tyranny. I didn't do that in order to substitute another.
The substitutes are all on the bench, and that's where they'll start the match.
The substitute that thinks his place below him, will certainly be below his place.
Liberals hate religion because politics is a religion substitute for liberals and they can't stand the competition.
No international court can ever substitute for a working national justice system. Or for a society at piece.
Diplomacy and defense are not substitutes for one another. Either alone would fail.
All art is image making and all image making is the creation of substitutes.
Training is useful but there is no substitute for experience.
There's no substitute for work. There are no shortcuts. There are no secrets.
Cribbage, n. A substitute for conversation among those to whom nature has denied ideas.