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Hello again everyone!
First of all — I want to say a big thanks to the creators of Chroma and its LoRAs.
Thank you for giving this awesome instrument to the community! 💪
Also, huge thanks to ai839 — after seeing the kind of images he creates with this LoRA, I really wanted to test it out.
He also shared some great workflows (both txt2img and img2video) using WAN, including built-in upscalers, Face Refiner, and other tools.
If you want to make photo-realistic people, you should definitely check it out!
⚡ If you’re too lazy to read — here’s the Quick Summary (Pros & Cons)
✅ Pros:
Much faster generation speed (100 sec per image with my settings)
Sharper, clearer results
Can reduce blurry images and fix anatomy issues
❌ Cons:
Slightly weaker prompt adherence
Sometimes misses small visual details in complex prompts
⚙️ What This LoRA Does
I really slept on this LoRA — and it surprised me.
If your Chroma generations give you bad anatomy, blurry faces, or soft details, this LoRA woud fix it. I also recommend using this LoRA in combination with other LoRAs —
for example Chroma - Professional Photos, Lenovo UltraReal, or other loras of your choice
It produces sharper and clearer results, though it slightly sacrifices prompt adherence — not a big issue in most cases, but with very complex prompts you might notice small inconsistencies.
And quick reminder... If your prompt is 💩 — your final image will be 💩 too.
No LoRA can fix a bad prompt. 😅
⚠️ Tip: this LoRA gives the best results with CFG - 1. (Probably works only with cfg - 1)
🧪 My Test Setup
GPU: RTX 3060
ComfyUI
Sampler: Deis_2m
Scheduler: Beta 57
CFG: 1
Steps: 20 (recommended minimum ~8; adjust based on whether you want realistic or stylized results)
Some images also used additional LoRAs for variation.
📊 Comparison
Here is a comparison table showing results across different Chroma-Flash-Heun LoRA ranks.
This image is hi-res, so you can open it in a separate tab to check out all the details. 👀
🔚 Conclusion
However, you can still get great results even without this awesome LoRA — as long as your PC can handle Chroma smoothly, and you know the basic prompting rules and how to use Chroma in general. You just need to know some basic prompting rules and understand which settings to use.
But… if you don’t get good results or don’t have a powerful GPU, give this LoRA a try — it might really help you. ⚙️
🙏 Thanks for Reading!
Thank you for taking the time to read my short guide! 💙
I also have:
a basic guide about generating images in Chroma (HERE), and
another article where I explain why and how to use the “aesthetic” tag (HERE).
Feel free to check them out if you want to learn more about getting the best results from Chroma! ⚡
Below are examples with and without using Chroma-Flash-Heun.
Keep in mind that, in addition to Chroma-Flash-Heun, I also used a few other LoRAs to enhance overall quality.
LoRA used : Chroma-Flash-Heun
Prompt :
aesthetic 11 — a gritty, humorous painting of a streetwise cat wearing a dark turtleneck, holding a lit cigarette between its lips. The cat’s eyes are large and glossy, reflecting the harsh neon lights of a nighttime city street behind it. The background glows with yellow and green signage, blurred traffic, and the chaotic energy of an urban night. Smoke rises from the cigarette, curling into the moody air. The brushwork is expressive and textured, giving the cat an almost noir antihero presence — a mix of street art attitude and painterly realism.
LoRA used : Chroma-Flash-Heun + Chroma - The Fashionable Mech
Prompt :
aesthetic 11, photo of a retro-futuristic female android in 1980s cyberpunk style, standing in profile with a metallic headdress and smooth chrome body reflecting pink and purple light. The composition has a soft gradient background and stylized typography reminiscent of vintage magazine covers. film grain. realistic, clear details, 80s sci-fi aesthetic, pastel chrome palette, nostalgic futuristic tone, elegant mechanical design.
LoRA used : Chroma-Flash-Heun + Lenovo UltraReal
Prompt:
aesthetic 11, l3n0v0, photo of a person sitting curled up inside a shopping cart at night, wearing a gray suit and a large yellow Lego head mask with a smiling face. The scene is lit by dim streetlights, creating long shadows and a lonely, surreal mood in an empty parking lot. The composition feels absurd yet cinematic, blending humor with quiet melancholy. film grain. realistic, clear details, night lighting, muted colors, eerie calm atmosphere.
LoRA used : Chroma-Flash-Heun + Lenovo UltraReal,
Prompt:
aesthetic 11, l3n0v0, photo of a surreal sky scene showing a tall ladder stretching infinitely into massive white clouds, reaching toward a thin crescent moon. A person in mid-fall drifts away from the ladder, suspended among the clouds like in a dream. The lighting is soft and diffused, with warm sunlight fading through the mist. film grain. realistic, clear details, calm surreal atmosphere, poetic and melancholic mood, minimalist composition.
LoRA used : Chroma-Flash-Heun + Lenovo UltraReal,
Prompt:
aesthetic 11, l3n0v0, photo of a woman sitting in a bathtub filled with dark water, wearing a full formal suit and tie. They hold a glass of amber-colored whiskey in one hand, gazing calmly toward the camera with tired, detached eyes. Their wet hair sticks to their face, and a faint reflection appears in the window beside them. The lighting is muted and cinematic, evoking quiet melancholy and late-night introspection. film grain. realistic, clear details, soft green-yellow tones, emotional stillness, moody atmosphere, lonely luxury.
LoRA used : Chroma-Flash-Heun + Lenovo UltraReal
Prompt:
aesthetic 11, l3n0v0, close-up photo of a gothic woman with dramatic black and silver glitter makeup, sharp eyeliner resembling cracks of darkness, and glossy black lips smeared with traces of red near the mouth. Her pale skin glows softly under warm light, contrasting with her dark hair and metallic shimmer around the eyes. film grain. realistic, clear details, cinematic portrait lighting, moody gothic elegance, emotional intensity.
LoRA used : Chroma-Flash-Heun + Vintage Fantasy illustration
Prompt:
A vintage-style fantasy illustration of an old wizard standing at the edge of a rocky cliff, overlooking a bright, winding mountain stream that glitters in the sunlight. He wears a long deep-blue robe with golden trim and holds a wooden staff, his white beard flowing in the breeze. Around him, wildflowers bloom among the grass, and the valley below stretches between misty blue mountains bathed in warm morning light. Above him, in a playful storybook-style font, are the words: “Sorry I missed your call, I was watching a stream.”
The image carries a lighthearted tone, blending classic fantasy illustration with gentle humor — painted in warm watercolor hues and soft nostalgic brushstrokes reminiscent of vintage children’s book art. Vintage Fantasy illustration
LoRA used : Chroma-Flash-Heun
Prompt:
aesthetic 11 — a surreal fantasy landscape where a massive blue whale floats gracefully above a desert oasis. Tall green cacti rise among blooming white desert flowers, their petals glowing under vivid sunlight. In the distance, red rocky mountains frame a shimmering blue lake that reflects the clear sky. The scene blends marine and desert worlds into one dreamlike vision — vibrant, impossible, and majestic, painted with bold contrasts and a nostalgic cinematic glow.
LoRA used : Chroma-Flash-Heun
Prompt:
aesthetic 11, film grain. realistic, clear details, HDR 35mm cinematic late golden hour, soft bloom and halation.
Photo of an old robotic hand lying palm-up in a wild meadow, covered in soft moss and patches of rust. The metal surface is aged and weathered, with joints filled with dirt and delicate vines wrapping around the fingers.
The hand lies in cool forest shade, yet a single shaft of sunlight breaks through the canopy, illuminating the metallic surface with glowing warmth. Light catches on the moss and metal, producing subtle glare, soft bloom, and faint halation around bright edges.
A small orange butterfly rests on one fingertip, its wings shimmering in the golden light. Tiny fireflies float gently around the hand, their faint yellow-green glow adding a dreamy, living sparkle to the air.
Around the hand, vibrant wildflowers bloom — deep crimson, bright yellow, and violet — their petals glowing softly in the dim surroundings. The background melts into a smooth bokeh blur, highlighting the serene union between nature and forgotten technology.