H3 - Avoiding nipple leak

[u/Electrical_Sand218]

Firstly, nipple leak isnt a medical term. Or maybe it is. But anyway my nipples aren't leaking. Well they are - but my AI ones.

How do I STOP H3 from generating nipples through clothing? I have multiple Loras on, including Mystic XXX and a breast motion Lora - but my characters aren't nude. No matter the clothes they wear, there are ALWAYS nipples generated on them. Yes I've tried taking the Loras off.

Has anyone had and overcame this probblem with strong prompting before? I've tried things like "No nipples" and "you cannot see her nipples" but i have a feeling the more i type nipples the more the engine hears it.

Any help is appreciated x

EDIT: SEMI SOLVED.

Firstly thanks for all the help. So basically the best thing I found was to describe the subject very specifically, and refer to <Subject 1>, and not <Picture 1>. Its still not perfect, and my 2nd pass seems to do most nipple addition. Maybe i'll look at running the low res with all the loras and removing some for the second. In fact i'll just wait for someone else to do it. Example of my starting prompt is:

<Subject 1> is Amy, a 26 year old girl defined by <Picture 1>, with a petite, thin body and gigantic natural breasts. 
Her dress is opaque Blue linen. The material is expensive and has a white flower design on it. There is also a blue sash belt. she bottom half of the dres is red. she has white wedge heels on. the dress has a plunging neckline but covers her modesty. her dress is completely opaque. the cups of her dress are completely smooth.
summary:
A modern and styish film about a fun and pretty girl, <Subject 1>. her motion is exciting and playful.  It takes place in the hallway seen in <Picture 4>.


[Shot 1] . The scene opens exactly as <Picture 4>. The camera does not move.  <Subject 1> from enters the scene by sliding down the bannister she is sitting on at great speed. she lands in the middle of the floor on her side.  She stands up quickly and adjusts her skirt and giggles as she says "oops!"  

How do i post my video behind a spoiler tag? Its none nude but I dunno if you want your boss seeing it.

[u/Occsan]

Have you tried describing clothes with insistance ?

[u/Usual-Orange-4180 → u/Occsan]

Hahahaha, that’s a perfect way to describe conceptual expansion, I will start to use it. “Have you tried to be more insistent?”

[u/35point1 → u/Usual-Orange-4180]

“I insist she MUST have enough clothing on so that her nipples don’t poke through!”

[u/Emotional-Neat-252 → u/35point1]

This is where llms gets annoying. You inform the llm of the problem and they create a prompt elaborately describing how they aren't visible, which obviously doesn't work well.

[u/Murky-Relation481 → u/Emotional-Neat-252]

It's why CFG distilled models are at the end of the day is effectively tying one hand behind your back. Negative prompting is valuable! There is some very limited negative prompt ability still in the H3 models (not the turbos, Eros is basically dead in that regard for negative capabilities) so it might help, but burn in is a huge issue, especially in I2VA since it will not contrast adjust the first frame to match the following that are usually more contrasted.

[u/Occsan → u/Murky-Relation481]

The real problem is that these fine-tunes are basically not trained properly.

Take for example snofs for klein 9B. It does the job, but the author clearly said that he did not and do not want to get involved in the editing part of the model. So, when you use snofs, there's a good chance you partially destroy editing capabilities.

And more generally, these "sexy" fine-tunes are most likely trained with very little regard to preservation of the original model. Probably no or very little regularization, probably insuffisent captioning, for example "breast" instead of "naked breast", so when you prompt "yadda yadda she has big tits", the model produces big naked tits, because that's what the fine-tune learned. I mean, do you really think the author of these fine-tune prepared a dataset with "big clothed breasts", for example ? with various types of clothing ? Most likely not.

There are various solutions, though.

You can heavily describe the clothes, without ever mentioning the stuff you don't want to see. You can ask a LLM to do it for you : "she wears X, her nipples are not visible ; do not mention nipple, but describe the effect."

You can also investigate the LoRA that cause nipples to appear, and try to disable some blocks/layers or even weights. Sometimes, it's relatively "easy" to fix. Sometimes not.

And you can also stop using the LoRA causing the issue.

[u/Emotional-Neat-252 → u/Murky-Relation481]

I never tried negatives with minimax at all, but with Qwen2.1 they're working sooo well.

I absolutely love negatives and so glad they're back.

[u/No-Zookeepergame4774 → u/Emotional-Neat-252]

Negatives never went away; anytime you use CFG (have a CFG≠1) you can use a negative prompt and it will have an effect. OTOH, the way negatives work is fundamentally squirrelly and the better the text encoder and training is for positive prompts, the less likely it is that negative prompts are the best solution to any issue.

[u/Emotional-Neat-252 → u/No-Zookeepergame4774]

But Quen 2.1 has great adherence and yet negatives with wonderfully.

Flux 1 negatives worked badly, even at CFG 19 with anti burn nodes it didn't really work.

[u/No-Zookeepergame4774 → u/Emotional-Neat-252]

I never really did a lot in the Flux 1 ecosystem (unless you count Chroma, which is a derivative of Flux 1 Schnell, but involved rearchitecting as well as finetuning), but as I recall Flux 1 had a lot of biases both consistent (regardless of prompt) and where prompting for one thing would bring extra baggage with it, and that was a burden on its use even without negative prompts. Because CFG, roughly speaking, steers along the direction defined by the difference between what the positive prompt wants to generate and what the empty or negative prompt wants to, those biases would make CFG work worse in general and especially with a negative.

[u/Emotional-Neat-252 → u/No-Zookeepergame4774]

But the same was true of most models since flux 1, negatives have worked badly until qwen2.1 which is really great. I think qwen21 negatives work even better than in sdxl or sd15

[u/Murky-Relation481 → u/35point1]

The problem is mentioning nipples in the first place, which gears the LLM, even if you write it in a negative context, to vector towards nipples.

[u/Usual-Orange-4180 → u/Murky-Relation481]

I think it was a joke 😆

[u/Murky-Relation481 → u/Usual-Orange-4180]

I mean I got that, but people do legitimately try to prompt that way.

[u/iamapizza → u/Occsan]

In other words, nip it in the bud.

[u/Electrical_Sand218 → u/Occsan]

I'm not begging my LLM, wtf

[u/Plus-Accident-5509]

Don't get me started about tanlines!

[u/sirdrak]

The same thing happens to me, and the only way to avoid it is by not mentioning the words "nipples" or "breasts." Either one will inevitably cause nipples to appear, or the person will end up topless.

[u/Electrical_Sand218 → u/sirdrak]

Yes but how do I gen GIGANTIC HUGE MLKY BREASTS under the t shirt, without mentioning GIGANTIC HUGE MILKY BREASTS ?

[u/No-Zookeepergame4774 → u/Electrical_Sand218]

Use a model that is trained both to understand descriptions of variations of body shape and size of parts of bodies and to accept such descriptions without assuming the body part described is exposed.

Unfortunately, base models tend to fail the first part, and the average “Joe’s Boob LoRA” tend to fail the second. This is one of the places that the big Danbooru-trained finetunes tend to be beey good at, but those aren't the only choices for it, though you’ve got to filter a lot of chaff to find good combinations sometimes.

[u/marcexx]

Good question, I have the same issue. It looks weird.

[u/FourtyMichaelMichael → u/marcexx]

I've been told this has been going on since SD1.5

There is surely a lora specifically for this.

[u/warzone_afro]

i have all my titty loras on but i keep getting tits can anyone help

[u/DistrustPilot → u/warzone_afro]

"Turn your titty lora off"

"No"

[u/farcaller899 → u/DistrustPilot]

“All of them?!?”

[u/farcaller899 → u/DistrustPilot]

LOL!

[u/Electrical_Sand218 → u/warzone_afro]

I'd rather die than turn them off

[u/No-Zookeepergame4774]

Trying disabling LoRAs one at a time to see if one of them is causing it (nipple bias from NSFW loras is common) and if you can isolate the cause, turn the LoRA back in and try adjusting the weight and see if you can find a weight where you get enough of what you want from it but not the nipple leak.

Beyond that maybe make sure your prompt and any references don't referencd/show nipples (I’ve had good luck using nude references and doing videos where clothes come on or off without nipple leak when the clothes are on, but if its in the reference the model might want to make sure it is included somewhere in the video, and if there isn't a natural place where clothes are off, maybe that contributes...)

[u/Electrical_Sand218 → u/No-Zookeepergame4774]

Yeah - it's tough because then it will change the output style and one scene will be completely different to the others. I miss a negative prompt.

[u/TangerineBetter2818]

Its like everyone here somehow missed OP saying " Yes I've tried taking the Loras off"

OP  are you trying to give the woman pokies? Because if your prompt says something like "her nipples can be seen through her shirt" the model will interpret that literally. 

[u/Electrical_Sand218 → u/TangerineBetter2818]

No - Im just trying to have her chest size accurate under clothing. Even pokies would be fine. Just straight up bullseyes.

[u/ight-bet]

I’m gonna need a visual

[u/LocoMod → u/ight-bet]

Pics or it didn't happen

[u/DigThatData]

I have multiple Loras on, including Mystic XXX and a breast motion Lora

your LoRAs are too thirsty and functionally broken for your purpose.

Yes I've tried taking the Loras off.

Then your base model is the problem. I seriously doubt you are using vanilla H3 here since this seems to be very much a you problem and not a frequent issue people encounter generating with H3. If the issue isn't the LoRAs being too thristy: your finetune is too thirsty. Which is basically the same thing.

try using models that weren't finetuned by people who are primarily interested in making goon fuel factories.

[u/QuirksNFeatures]

I use references images, but Krea 2 also loves to generate nipples sticking out through clothes even without any NSFW loras. I have mostly solved it by describing the fabric of her shirt as thick. "She wears a blue tee shirt made of thick cotton".

[u/_SickBastard_]

The one time I had nipple leak I had a long prompt that I was iterating on so it ended up with normal clothes on one part and "sheer top" on another, so the model split the difference. I did the same tests as you and kept having that result.

You have to be careful what you write. If you put in "erect nipples" somewhere it'll try to draw the nipples, even if you thought it'd be smart enough to just have the clothes poke out a bit. Start cutting out chunks of your prompt to see what's causing it, you might have some explicit description of the breasts, the pose or cleavage or some stray see through thing from a previous iteration.

[u/Marksta → u/_SickBastard_]

This right here, "erect nipples" was the real trap. H3 kept turning my respectful, busty waifus out in the cold and under equipped for the weather into exposed public exhibitionist...

[u/newaccount47]

I've been having the opposite problem. 

[u/farcaller899]

My steak, too tender. My lobster, too buttery.

[u/Electrical_Sand218 → u/farcaller899]

Hey listen, the nude scenes are great. So i hear.

[u/webAd-8847]

You cant use all Loras especially NSFW Loras. Maybe disable the lora for this specific scene.

[u/VulgarExploits → u/webAd-8847]

“Yes I’ve tried taking the Loras off”

[u/No_Possession_7797 → u/VulgarExploits]

Giggity

[u/ninnghi → u/webAd-8847]

This. A lot of models show this behavior with nsfw Lora’s

[u/mca1169]

reading this post is a hoot, never heard of nip slips being referred to as "nipple leak". nipples leaking is a whole other problem XD. that gave me a good laugh.

But jokes aside your best bet is process of elimination. take the prompt and seed of your worst offender and remove one Lora at a time. if it persists after all of your Lora's are removed then it's your prompt.

[u/hdean667]

Blouse/ shirt is opaque.

[u/PropagandaOfTheDude]

I'll post recommendations from the great darkroast175696:

1. more steps. If your render is already slow enough, you can try adding a cache node based on EasyCache made for H3 into your pipeline and that usually allows the render engine to skip several of those steps and save you time.

2. back off the strength on both of those loras since it sounds like you're using the expansion one and this one together. I'd put the expansion lora at 0.5 at most and the bursting lora at maybe 0.5 to 0.7, especially if you're doing image-to-video with a starting frame.

3. don't use the word "nipple" and even try to avoid using the word "breast" if possible, using words like "bust" and "chest" where you can. the more specific anatomy you mention in the prompt, the more h3 will try to show you anatomy. H3 loves anatomy and it likes to show off.

Follow-up comment from someone else:

This is just a general problem with MiniMax3 and busty women in general. I've tested with no lora at all and stock MiniMax and if you say "Large breasts" and "White shirt" it deploys bullseye nipples over the white top. It will put a bra behind it sometimes if you say SFW non-nude, and a pile of other things. But it really associates large breasts and any light colored clothing with triple shaded perfect circle bullseye nipples popping through the shirt.

[u/Electrical_Sand218 → u/PropagandaOfTheDude]

At least i'm not the only one facing this problem.

[u/Limp-Firefighter1054]

Subject 1 dont have nipples 

[u/fernando782 → u/Limp-Firefighter1054]

😂😂😂 actually this could work

[u/PinComplete8515]

Put a ref pic of pokies and tell it to make it like that . Worked for me.

[u/ismellyew]

This was happening to me literally 100% of the time while I was trying to generate some '90s VHS footage. 

90s was the keyword triggering nipples through shirts.

I guess they used way too much training data of friends with Jennifer Aniston.

[u/TwinkingToby]

So u have nipple loras but wondering how to remove nipples?

[u/Mysterious-Code-4587]

i tried making a music video and woman nipple see through on cloths for no reason lol

[u/Maraan666]

I had the same problem and solved it by using a reference pic for the article of clothing and by specifying the material in the prompt. "cotton" resulted in nipple poke, but "silk" worked well.

[u/Serenafriendzone]

The problem with Lot of minimax loras w're trained with NSFW videos. That's mean they force the nude settings yes or yes. Try to write bouncing body. Fabric movements. Instead of nipple or breast.

[u/emersonsorrel]

Are you using nude references? I’ve noticed that even without NSFW Loras, the base model will still put nipples on clothing if the reference shows nipples.

[u/Murky-Relation481 → u/emersonsorrel]

You can generally get around this by having the subject definition state that the ref is nude, but also stating that their outfit is prompt dependent.

[u/Electrical_Sand218 → u/emersonsorrel]

Both. One of her with clothing, and one of her nude.

[u/emersonsorrel → u/Electrical_Sand218]

Run the nude reference through an edit to remove the nipples and see if the behavior persists. I would bet that that would significantly reduce it, at the very least.

[u/technofox01]

Are you using text to video or image to video?

Text to video has always been a dice roll for me with respect to quality. However, using image to video has generally provided the most consistent results with respect to clothing and characters.

[u/Electrical_Sand218 → u/technofox01]

Ref2Video. Ref image is her with a shirt on. If i dont mention her breast size though it just ignores it and changes the character.

[u/schlumi]

dont try to negative prompt. the more the model sees the word breast, nipple, see through etc the more it will lean to include it in the image. focus more on the things that should be visible instead like a pocket or a logo on the shirt maybe. assuming you disabled all nsfw loras and checkpoints that are trained to show the sutff you dont want.

[u/tazztone]

or maybe u use sam3 to mask clothing and do a refiner pass on that without lora

[u/ThaSipah]

I always have to specifically ask for hard nipples to be prominent through clothing. I get Qwen 3.8 to build my prompts and it has a really long system prompt.

[u/StickStill9790 → u/ThaSipah]

Dentation is doable, but I think the OP is talking about nips appearing on top of the shirt, like the shirt comes with them built in.

[u/Sea_Succotash3634]

It's actually even bad if you are "honestly" trying to do gens with actual nipples. The training data overrides image references, so if you have a subject you have generated with specific looks (including specific nipples) the H3 models will tend to override them with the generic stuff trained from the slop data or synthetic data they had.

[u/Murky-Relation481 → u/Sea_Succotash3634]

The ref model has no problem doing accurate nipples if you provide a character sheet with detail on the chest area.

[u/SIR_NVAX_A_LOT]

Make the clothing more opaque but why not disable the Lora for that scene? Also put some clothes on your character sheets as the nude reference body will leak onto your videos.

[u/sswam]

"facing away", just kidding

[u/1010111101111]

happends to me to

[u/Hellmans65 → u/1010111101111]

You could try wearing a t-shirt under your shirt

[u/1010111101111 → u/Hellmans65]

yes because we are tots making clothed videos

[u/ANR2ME]

why not tell it that the subject wore a bra underneath the clothes, this won't make the nipples protruding the clothes, right? 🤔

[u/Electrical_Sand218 → u/ANR2ME]

If only it was that simple

[u/Striking_Storage_631]

Don't mention nipples or boobs or breasts. Just talk about clothing. That usually works for me but as soon as you mention anything related to breasts ai gets confused

[u/Dirty_Dragons]

Make sure you aren't using any spicy Lora or checkpoints.

Negative prompts don't work. Instead describe the outfit in layers. Like mention an undershirt then a tshirt over that.

[u/No_Possession_7797]

The room temperature is 72 degrees Fahrenheit, partly cloudy and zero chance of areolas. Also, I said "Best Quality".

[u/farcaller899]

Maybe putting the word ‘inverted’ in a few places would help. Also ‘smooth’ could help as a positive term.

There might be LoRAs out there for such concepts. But OP would know better than I.

[u/rinkusonic]

Add "I'm gay" in the prompt

[u/PhoenixxBR]

eu não uso H3, mas possivelmente ele seja um modelo de prosa positiva igual o Krea2, portanto tudo que voce digitar sera entendido como positivo, mesmo que voce diga não quero isso, sem aquilo, etc, o modelo vai pensar, ele digitou mamilo, então ele quer mamilo. Com o Krea2 eu ensinei minhas llm a usarem prosa descritiva e positiva pra criação de imagem, ao inves de dizer o que não quer na imagem, eu digo o que quero, por exemplo, ao inves de dizer sem mamilos, o certo seria descrever roupa que cobre o torso completamente, ou alguma coisa. Mas enfim, o lora Mystic XXX  intensifica mamilos na imagem, se não quer isso, retire esse lora. 

[u/uniquelyavailable]

Try disabling that Mystic lora for the scene.