All screenshots are taken from the same distance with oversize set to 0. Some effects might be different when in motion, or might have more randomness to them that screenshots won't accurately show.
Orb Projectile
Baptiste Biotic Launcher
Bastion A-36 Tactical Grenade
Echo Sticky Bomb
Genji Shuriken
Lucio Sonic Amplifier
Mei Icicle
Mercy Caduceus Blaster
Moira Damage Orb
Moira Heal Orb
Orisa Fusion Driver
Pharah Rocket
Reinhardt Fire Strike
Roadhog Scrap
Scrap shows random bits, the screenshots might be different but both Friendly and Enemy will show the same bits. Once created, scrap goes invisible after a few seconds. You can reset it by toggling the visibility.