Input (Lo que quieres):
Quiero crear "la imagen de un ciclista encima de su bici pedaleando por una senda ciclista"

Output (Lo que genera ChatGPT gracias al máster prompt):

Prompt 1: /imagine prompt: a cyclist on his bicycle in a cycling track, pedaling ardently amidst the sinuous curvature of a velodrome, cocooned within a vast urban park at dawn, imbued with tranquility and determination, Photography with a Canon EOS 5D, Natural morning luminescence cascading diagonally, --ar 3:2 --c 5 --s 850 --q 3 --v 5

Prompt 2: /imagine prompt: a cyclist on his bicycle in a cycling track, effortlessly gliding with a sinewy grace, surrounded by a swirling mist in a dense forest clearing, capturing an ethereal and mysterious aura, Hyperrealistic digital art, diffuse lighting permeating through tree canopies, --ar 2:3 --c 15 --s 720 --q 3 --v 5

Prompt 3: /imagine prompt: a cyclist on his bicycle in a cycling track, propelling with fervent vigor on a luminous neon circuit, amidst a nocturnal cityscape with towering skyscrapers, resonating a vibe of futurism and speed, Photography with a Canon EOS 5D, stark contrasts with neon reflections, --ar 3:2 --c 19 --s 660 --q 3 --v 5

Prompt 4: /imagine prompt: a cyclist on his bicycle in a cycling track, cruising with poised elegance across a bridge of floating lilies in an otherworldly realm, exuding serenity and magic, Hyperrealistic digital art, soft ambient glow enveloping from below, --ar 2:3 --c 8 --s 550 --q 3 --v 5

Copias y pegas estos prompts en midjourney y obtienes imágenes como estas: