Melita:
Doing some simple basic testing with a character turnaround. Melita's design is really simple so I'm not exactly looking for high consistency with her and wanted to have some sort of baseline for loopback testing. Unfortunately, I wasn't very successful so it's not really worthwhile writing and article for. I'll probably need to design a character with more complex details later for more stress testing. It seems for Illustrious knowing the proper prompts/artist keywords seem to help with the posing. The dataset is only a limited turnaround so the posing is very stiff. The anytest CN can help with adding dimensionality to the character which I think is only possible as her design is really straightforward.
Prisca
A complex character design. Images are very cherrypicked on the basis of the outfit but the LoRA performs very well in terms of inpainting. More overtrained compared to the other LoRAs due to loopback usage.
Elris
A rather simple character design this time to test out a couple of things regarding accessory training, and clustered objects along with experimenting with loopback.
3/4/24 Update:
Blind Test with SDXL training. I'll write an article about this later. Read 'About this Model' for more details.
Kie recommended weight:1
I am probably going to need to change the title of the page now since I am using txt2img ControlNets to augment the dataset for style. (I did use a LoRA to loopback but I used weight of .1~.2 and outd to weaken the effect. I did another round without the LoRA and the difference wasn't very noticable). Read below if you want see the specifics of the augmentation.
Enna LoRA focuses on a simpler design to see what mistakes in the turnaround make an impact on the LoRA design
About
This is a place where I keep my tests with single image OC LoRAs. The goal is to try and create a consistent character LoRA with a minimum amount of effort. If you're willing to spend time, you can create a consistent character in this tutorial here (not mine). Keep in mind that these experiments are more of a learning effort rather than producing an accurate LoRA. Due to the limited dataset, these LoRA are highly likely overfit in weird scenarios that I haven't tested yet. I'll probably write an article about the process in the future.
Articles on Workflow
Images are of-course cherry picked with adetailer and hi-res fix with (AnimeSharp4x\UltraSharp4x) at 0.2 ~ 0.5 denoising strengths.
Isabella's original image is the second image in V1. (Base prompt might be useful)
Usage
Recommended Weight for V4: (0.5~0.8) Block Weight can help but isn't completely necessary.
Recommended Weight: 0.6 ~ 0.8 + (LoRA Block Weight with OUTD preset recommended; For version 3, the block weight extension is highly recommended).
For Enna: Recommended Weight: 0.8 ~ 1 (Lower if encounter concept bleeding)
Use terms such as: flat_chest,petite to get character proportions correct.
You can get away with 1 weight with the block weight extension but will need to lower the weight if you want do custom outfits. Requires long prompts that describe that character and the environment to work well.
It should work well enough with anime-based models, I haven't tried anything realistic or semi-realistic. Probably best used with an inpainting workflow.
Problems
Inconsistency with coloring and outfit
facial expression is overfit
Hairline is occasionally flipped
V2 is probably better than V3; I ran into a roadblock but decided to publish my results for now
Training
V1
1 Full body shot +1 crop image of face (same image)
Trained on NovelAi
V2
Reused dataset from V1
Added upperbody,lowerbody, and leggings crop
lowered repeats
more captioning
V3
removed flip augmentation
reused data set from v1
added 3/4 images of the head and skirt, boots to neck,close-up of bangs
more captioning
Others
I likely hit a wall with Isabella so I might not be able to improve the LoRA any further. There are a few more things I could try with kohyaSS trainer but I'm not expecting much. The main limitation is that the base image isn't very high quality and has image artifacts on zoom up.
V4
reused data from v3
moved regularization over into the main dataset and added trigger words for style
added style images using txt2img with canny and lineart using regional prompter to augment the dataset for style, tagged as 'alternativecostume'
selected images with closest colors
added style and outfit triggerwords
n tokens increased to 4
removed block weight during training
Enna
V1
Based on a character turnaround
Uses same concepts from V4
V1.1
minor update with more captioning and lower training rates by 1/10th
V2
Added full turnaround of swimsuit and underwear
Description
Final version after applying image loopbacks. The LoRA prior to loopback has better details but somehow adding the loopback images caused the pupil shape to undertrain.
Training Goals:
Complex Pupils
Lower Body Outfit Fidelity
Results:
Getting pupils correct will require inpainting or usage of adetailer. Inpainting manually has better results compared to adetailer. With some editing, the pupils can be obtained in a single inpaint pass. Otherwise use two passes. Pupil shape is correct but the shading is incorrect where the bottom half appears to be transparent.
Lower Body is a massive struggle. I will attempt to create another character design to test some more theories as I am running to roadblocks now.
Undertraining
Hairline
skirt design
pupil shading
Overtraining
Pose
Augmentations
Style
Camera
Censor
Close-ups
Loopback
Issues:
Due to the usage of lower quality images, antialiasing artifacts are present. This is fixable but I'm too lazy to do so. Main cause is that I did not upscale every base image consistently.
Poses are overtrained and might need emphasis to work
Concept bleeding is present for outfits around 'dress' or shirt based designs
Recommended to use style LoRAs to get around style bleeding.