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---
license: creativeml-openrail-m
---
---
license: creativeml-openrail-m
---
This is a low-quality bocchi-the-rock (ぼっち・ざ・ろっく!) character model.
Similar to my [yama-no-susume model](https://huggingface.co/alea31415/yama-no-susume), this model is capable of generating **multi-character scenes** beyond images of a single character.
Of course, the result is still hit-or-miss, but I with some chance you can get the entire Kessoku Band right in one shot,
and otherwise, you can always rely on inpainting.
Here are two examples:
With inpainting
Without inpainting
### Characters
The model knows 12 characters from bocchi the rock.
The ressemblance with a character can be improved by a better description of their appearance (for example by adding long wavy hair to ShimizuEliza).
### Dataset description
The dataset contains around 27K images with the following composition
- 7024 anime screenshots
- 1630 fan arts
- 18519 customized regularization images
The model is trained with a specific weighting scheme to balance between different concepts.
For example, the above three categories have weights respectively 0.3, 0.25, and 0.45.
Each category is itself split into many sub-categories in a hierarchical way.
For more details on the data preparation process please refer to https://github.com/cyber-meow/anime_screenshot_pipeline
### Training Details
#### Trainer
The model is trained using [EveryDream1](https://github.com/victorchall/EveryDream-trainer) as
EveryDream seems to be the only trainer out there that supports sample weighting (through the use of `multiply.txt`).
Note that for future training it makes sense to migrate to [EveryDream2](https://github.com/victorchall/EveryDream2trainer).
#### Hardware and cost
The model is trained on runpod using 3090 and cost me around 15 dollors.
#### Hyperparameter specification
The model is trained for 50000 steps, at batch size 4, lr 1e-6, resolution 512, and conditional dropping rate of 10%.
Note that as a consequence of the weighting scheme which translates into a number of different multiply for each image,
the count of repeat and epoch has a quite different meaning here.
For example, depending on the weighting, I have around 300K images (some images are used multiple times) in an epoch,
and therefore I did not even finish an entire epoch with the 50000 steps at batch size 4.
### Failures
- For the first 24000 steps I use the trigger words `Bfan1` and `Bfan2` for the two fans of Bocchi.
However, these two words are too similar and the model fails to different characters for these.
Therefore I changed Bfan2 to Bofa2 at step 24000. This seemed to solve the problem.
- Character blending is always an issue.
- When prompting the four characters of Kessoku Band we often get side shots.
I think this is because of some overfitting to a particular image.
### More Example Generations
With inpainting
Without inpainting
Some failure cases
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