Most of the images generated by AI painting have extra limbs and hands, which are very strange. After playing with the FLUX model, hands are no longer a problem.

In useAI painting toolsStable DiffusionHands have always been a serious problem. When AI draws hands, unnatural or wrong situations often occur. This is specifically manifested in the following aspects.

1. Missing or extra fingers: Sometimes, the hands of people in AI-generated images may be missing some fingers or have extra fingers.
2. Hand distortion: The hand may appear to be in an odd shape, with the fingers bent unnaturally or the entire hand twisted into an impossible shape.
3. Wrong hand placement: The hand may be placed in an inappropriate position on the character's body, such as the arm is crossed over the body, or the hand is positioned out of proportion to the rest of the body.
4. Loss of hand details: In some cases, the details of the hand may not be clear enough, such as unclear joints of the fingers or blurred texture of the palm.
5. Hand-object interaction issues: When a character's hands interact with objects, such as picking up something or shaking hands, the AI may not be able to correctly depict this interaction, causing the object to appear to be floating or the hand to pass through the object.
6. Disproportionate hands: The size of the hands may be disproportionate to the character's body, either too large or too small.
7. Hand shadow and lighting issues: The shadows on the hands may be incorrect, causing the hands to appear to be floating, or the lighting effects may make the hands look unnatural.

The problem with hands also exists with feet. With the development and improvement of AI painting, Flux.1 recently launched by Blank Forest Labs has made great improvements on hands and feet. Today I will share the results of my personal practice.

The large model used in this article is Flux1. dev-fp8 version. You can experience it in the following ways

(1)LiblibAI:WebUI

• Web UI: https://www.liblib.art/modelinfo
• /488cd9d58cd4421b9e8000373d7da123

Related parameter settings:

• Sampling method: FlowMatchEuler
• cfg:3.5
• Sampling steps: 20

(2)LiblibAI: ComfyUI Flux1.dev workflow

• ComfyUI:https://www.liblib.art/modelinfo
• /ec6223dccd7b47658464eaf7b94d7dc5

(3) Locally build the ComfyUI Flux.1 workflow

Reference article: Flux [Basics]: Local deployment and installation tutorial of ComfyUI Flux.1 workflow

(4) Free experience of ComfyUI Flux.1 workflow in the cloud

Reference article: Flux [Basics]: ComfyUI BizyAir plug-in, cloud-based Flux.1 Dev version for fast image output experience

(5) How other websites experience Flux.1

Reference article: Flux [Basics]: Share some websites where you can experience the Flux.1 model online

1. Hand

1. Close-up of hands

• Prompt: POV someone holding their hand up, stunning black forest mountains
• Prompt words: POV someone raised his hand, amazing black forest mountains

• Prompt：A super beautiful Chinese girl lying on a grass field, shielding her eyes from the sunlight with her hand. The scene is viewed from above.
• Prompt word: A super pretty Chinese girl lies on the grass, shielding her eyes with her hands. This view is from above.

• Prompt：filmic photo of a group of three beautiful chinese girls on a street downtown, they are holding their hands up the camera
• Prompt word: A group of three beautiful Chinese girls on a street in the city center, they raised their hands to the camera

In general, the close-up images of hands are quite stable, and the probability of a bad hand is relatively low.

Of course, this does not mean that there are no hand problems at all. In the following set of pictures, the problem of missing fingers and extra fingers still exists.

2. Full body photo from the front

In order to facilitate full-body photos, the image width and height can be set to 768*1024

• Prompt: a RAW ultra-realistic photo,UHD,8k, 1 super beautiful Chinese girl,denim shorts,midriff,navel,short shorts,(full body:1.5),outdoors,green lawn,water
• Prompt word: A RAW hyper-realistic photo, ultra-high definition, 8k, of a super beautiful Chinese girl, denim shorts, upper abdomen, belly button, shorts, (full body: 1.5), outdoors, green lawn, water

• Prompt：a RAW ultra-realistic photo,UHD,8k,full body portrait
• of 1 super beautiful chinese girl,standing,wearing a floral-patterned qipao in rich red and green hues and high heels,looking at viewer
• Prompt word: An ultra-high-definition, 8k RAW ultra-realistic photo of a super beautiful Chinese girl, full-body portrait, standing, wearing a bright red and green printed cheongsam and high heels, looking at the viewer

For full-body portraits, if it is a frontal view, the probability that the hands are normal is relatively high.

3. Full body side view

We are looking at the side view of the portrait (add the keyword "viewed from the side")

For full-body portraits, if it is a face view, the probability that the hands are normal is relatively high.

For full-body portraits, whether it is a front view or a side view, the probability of getting normal hands is still quite high, but during the test, the hand rendering sometimes still has some minor flaws. The following is a picture of the effect of the hand rendering being not in place.

4. Hand-object interaction

• Prompt：a RAW ultra-realistic photo,UHD,8k,1 super beautiful chinese girl,hanfu, textured skin,skin particles, full body,
• outdoors, rain, oil paper umbrella, light jade, elegant, light green tone
• Prompt word: A RAW hyper-realistic photo, ultra-high definition, 8k, 1 super beautiful Chinese girl, Hanfu, textured skin, skin particles, full body, outdoor, rain, oil-paper umbrella, light and elegant, light green tones

From the generated images, the umbrella can be held normally in the hands of the beauties in most cases, and the position of the umbrella is not random (sometimes the umbrella floats in the air) like in SD. However, the probability of drawing a satisfactory image is relatively small, and the probability of rendering errors in the hands is relatively high.

Below is a picture of the effect of the hand rendering being a little inadequate.

Overall, Flux is very good at processing portrait hands, which is a huge improvement in the field of AI painting.

2. Feet

• Prompt：a girl holding up her bare feet, closeup photo of feet
• Prompt word: A girl holds up her bare feet, close-up photo of the feet

• Prompt:A super Chinese beauty stretches bare feet with nail polish, foot focus, the beach background
• Tips:A super beautiful Chinese girl stretches out her bare feet with painted nails, foot focus, beach background

• Prompt:A super beautiful Chinese girl lying on a yoga mat, stretching with legs raised in the air. viewed from the side.
• Tips:A super pretty Chinese girl lies on a yoga mat and stretches her legs. View from the side.

It can be said that it is very difficult to draw a satisfactory picture with the above prompt words. Moreover, the rendering effect of the toes is not good, and it is easy to make limb errors. (It is not clear whether it is due to the prompt words).

In general, Flux's rendering effect on the close-up of the character's feet is quite good. However, for certain postures of the character, the rendering effect of the toes may not be in place, and certain postures may easily cause the dislocation of the character's limbs.

Okay, that’s all for today’s sharing. I hope that what I shared today will be helpful to you.