Nya Dimension Lab.

水彩を実現するLoRAを試してみました。

今回試すのは、”沁彩 Colorwater”です。英語でColorful Colorwater。

https://civitai.com/models/16055/colorwater

最新版のV4をダウンロード、LoRAフォルダにコピーします。

早速試してみることに。モデルは、Anything V5です。

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:1>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: Euler a, CFG scale: 5, Seed: 3903053480, Size: 768x512, Model hash: 7f96a1a9ca

CFGは、3から6が推奨されています。5を指定してみました。Colorwater V1からV4まで、それぞれ傾向がことなりますが、V4は、コミックイラスト系な感じです。アニメやゲームの制作時のストーリーボードイラストの雰囲気です。

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:1>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: Euler a, CFG scale: 6, Seed: 1038089341, Size: 768x512, Model hash: 7f96a1a9ca

CFG=6です。これは情報量が整理されていい感じでは。AIの生成は、画像全体のノイズから確率的に生成するため、全体にまんべんなく情報量が多くなります。過ぎたるは猶及ばざるが如しということで、多い情報量は、ときに毒になります。情報量が整理されると、人間は絵から受ける印象を考える余裕がでてきます。

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:1>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 8, Seed: 315384196, Size: 768x512, Model hash: 7f96a1a9ca

CFG=8です。水彩の影響は減衰しますが、情報整理ツールとしてはかなり有効です。

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:1>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 4, Seed: 172777612, Size: 768x512, Model hash: 7f96a1a9ca

CFG=4の作例です。水彩LoRAの本領発揮です。完全に水彩タッチです。(Anything絵がどこかにでかけてしまった…)

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:0>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 3, Seed: 395395969, Size: 768x512, Model hash: 7f96a1a9ca

比較用に素のAnything絵を用意しました。CFG=3は、あまり使いませんが。

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:0.5>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 3, Seed: 395395969, Size: 768x512, Model hash: 7f96a1a9ca

Colorwaterは、0.5に設定しています。Anything絵を残しつつ、水彩ペイント風になっています。

((masterpiece,best quality)), Depth of field, (bokeh), 1 girl, elf ear,highschool uniform, black jacket, looking at viewer, Petals fluttering, standing, japan street, profile, <lora:Colorwater_v4:0.5>
Negative prompt: EasyNegative, signature, watermark, username, blush, plush toy, torii, bad fingers, few fingers, many fingers, many fingers, bad logs, bad anatomy, bad hands, bad arm, large breast, huge breast
Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 3, Seed: 395395969, Size: 768x512, Model hash: 7f96a1a9ca, Denoising strength: 0.52, Hires upscale: 2, Hires upscaler: R-ESRGAN 4x+

Hires Fixは、拡大アルゴリズムの選択が重要です。Latentは、タッチがぶれすぎる結果になりました。水彩のタッチと相性が悪いようです。