import torch
from diffusers import AutoPipelineForText2Image, LCMScheduler

model_id = "stabilityai/stable-diffusion-xl-base-1.0"
lcm_lora_id = "latent-consistency/lcm-lora-sdxl"

pipe = AutoPipelineForText2Image.from_pretrained(
    model_id,
    torch_dtype=torch.float16,
    variant="fp16"
)

pipe.scheduler = LCMScheduler.from_config(pipe.scheduler.config)
pipe.to("cuda")

pipe.load_lora_weights(lcm_lora_id)
pipe.fuse_lora()

prompt = "Sky Meilin, consistent AI persona, creator system, cinematic portrait"

image = pipe(
    prompt=prompt,
    num_inference_steps=4,
    guidance_scale=1.5
).images[0]

image.save("sky_output.png")