Umamusume: Pretty Derby (Steam)

[Vemfilia]

Good work guys

[CaaSa88]

On 8/28/2026 at 10:16 PM, girufanasu said:

Thank you!
Thanks to you, the jiggle motion has changed!
Perhaps the original value I specified was too high, causing no reaction.
I had replaced the character with a nude using a MOD, so layering clothes was complicated and I didn't understand it well.

I'll fine-tune it from here to find the jiggle I like!

Since I was taught this,
I'll write down the process for others who, like me, want to modify nudes and jiggle.
I tried it on the Japanese version of Steam, but it's probably the same on the Japanese version of DMM.
What you need is:
UMML ← Can be used to upload character settings, data replacements, MODs, etc.
UmaViewer ← Exports the necessary character data
UABEAvalonia ← Can be used to modify character data
Nude MODs are also discussed on this forum, so please try searching. You should be able to find people creating MODs by searching for keywords.

The process is to upload the nude MOD using UMML. (Import the entire target folder using "import Asset Folder")
For detailed instructions, you can use a translation tool or check the forum.

To make the breasts jiggle, extract the necessary data from UmaViewer (data replaced with nude data → generic clothing like 02, 05, etc.),
manipulate (~omitted~ bustX_cloth00) in UABEAvalonia, and
upload that modified data in UMML in the same way.
This is the process you can follow.

Nice  .
~
It would be incredibly kind of you if you could make a video tutorial so that those of us with "dum dum brains" could understand it better.

[Dandrone]

2 hours ago, CaaSa88 said:

Nice  .
~
It would be incredibly kind of you if you could make a video tutorial so that those of us with "dum dum brains" could understand it better.

A video tutorial would be a god send! Though I wonder what upload method would be better to avoid detection from Cygemusu. Uploading to google drive or uploading the vid here?

[goofyahhcats]

21 minutes ago, Dandrone said:

A video tutorial would be a god send! Though I wonder what upload method would be better to avoid detection from Cygemusu. Uploading to google drive or uploading the vid here?

google drive

[V3G0]

On 8/26/2026 at 7:01 PM, chonging said:

Where u get that file? are you using Umaviewer?

i finded using uma viewer, exporting the files of the actual skin

[peachy.keane]

On 8/30/2026 at 11:41 PM, spockman said:

When I use the "Copy All" function in UmaViewer to extract textures, only the wet and dirt versions are exported, and I cannot obtain the standard version. Please tell me how to fix this.

They're in there, worry not.

If you look at the files exported directly from the viewer in '3d > chara > body > [chara id] > textures' I know it may not seem like it at first glance—

—but when you load the entire folder containing all of your exported assets into AssetStudio, you'll see that they ARE in there.

It's because of this reason that I organize all of my exports like so:

[GF256]

0 float _stiffnessForce = XXX
0 float _dragForce = XXX
0 フロート _重力 = XXX

を１００にしてもやっぱり動画みたいに揺れないですね

共通のステージ衣装だとpfb_bdy0005_00_bust2_cloth00の変更だけじゃダメなのでしょうか？

動画の数値の変更したファイルをアップロードとかはできますか？

[negcham1942]

Hello. I’m writing to let you know that I tried out the breast-jiggle effect using this topic as a reference, and it worked successfully.

I'm posting a test video.

”I am using Google Translate.”

Toresen Ond.zip

[GF256]

 

I understand the result, but which file did you modify?
For example, if it was the standard stage outfit, which file was it?

[negcham1942]

5 minutes ago, GF256 said:

 

First, use Umaviewer to "Copy All" of the character assets. I extracted all the characters.

This creates "3d" and "sourceresources".

Next, open "3d/3d/chara/body/bdy0002_00/clothes/pfb_bdy0002_00_bust0~4_cloth00" in UABEA.

When you open it in UABEA, you will find "CySpringData~"; open that.

When you open it, you will find the set of "Bust L/R" parameters mentioned in this topic.

It seems like Sp_Ch_Bust0_L/R_00 has a small bust. I personally tweaked the "stiffnessForce," "dragForce," and "gravity" settings.

Nothing is needed other than the aforementioned "3d/3d/chara/body/bdy0002_00/clothes/pfb_bdy0002_00_bustX_cloth00".

Next, create an `assets` folder and place the `3d/chara/body/bdy0002_00/clothes/pfb_bdy0002_00_bust0~4_cloth00` file inside it.

As for `settings.json`, there is no issue with using the `settings.json` file included in the downloaded mod.

Please use UMML to import your favorite "Naked" mod. Then, install the breast physics mod you created using "Install Mod."

This should make the breasts sway.

end

”I am using Google Translate.”

[GF256]

3 hours ago, negcham1942 said:

First, use Umaviewer to "Copy All" of the character assets. I extracted all the characters.

This creates "3d" and "sourceresources".

Next, open "3d/3d/chara/body/bdy0002_00/clothes/pfb_bdy0002_00_bust0~4_cloth00" in UABEA.

When you open it in UABEA, you will find "CySpringData~"; open that.

When you open it, you will find the set of "Bust L/R" parameters mentioned in this topic.

It seems like Sp_Ch_Bust0_L/R_00 has a small bust. I personally tweaked the "stiffnessForce," "dragForce," and "gravity" settings.

Nothing is needed other than the aforementioned "3d/3d/chara/body/bdy0002_00/clothes/pfb_bdy0002_00_bustX_cloth00".

Next, create an `assets` folder and place the `3d/chara/body/bdy0002_00/clothes/pfb_bdy0002_00_bust0~4_cloth00` file inside it.

As for `settings.json`, there is no issue with using the `settings.json` file included in the downloaded mod.

Please use UMML to import your favorite "Naked" mod. Then, install the breast physics mod you created using "Install Mod."

This should make the breasts sway.

end

”I am using Google Translate.”

 

Thanks for letting me know.
It looks like I was putting it in the wrong place for UMML.
It's working now thanks to you.

[negcham1942]

46 minutes ago, GF256 said:

 

It turned out I was mistaken; Sp_Ch_Bust0_L/R_00 actually had a large bust.

[goofyahhcats]

incase if something happen with original mod

Support Card Re:Art (UMML)

 

mod by RanKaeder
UMML by me

it seem they forgot put PC-s so i made it

[konkichi]

I messed around with the shadow casting a bit.

 

[negcham1942]

When I change the range of the breast sway, characters with small breasts end up looking distorted—what should I do?

I am tweaking the following values.

[konkichi]

Maybe we should reset to the original values first, then tweak them while checking the movement.

[negcham1942]

15 hours ago, konkichi said:

Maybe we should reset to the original values first, then tweak them while checking the movement.

Lowering limitAngleMIN/MAX below the default values and increasing stiffnessForce and dragForce resolved the breakage issue, but the breasts of large-chested characters stopped swaying. Since the breast-swaying behavior appears to be shared across all characters, I’ll just give up on it.

[einnarr]

Model change for Matikanefukukitaru.

Half-nude and full-nude MODs already exist, but I'm planning to keep editing little by little.

Matikanefukukitaru.rar

Edited September 9 by einnarr

[goofyahhcats]

instead editing physics from asset

why not give me help with Hchimi?

 

i added overwrite training scene, bouncy yaris, fixed free cam on race pause

 

i ran out credit of assistance copilot

 

not planned

- disable chibi so u can swap dress without softlock

- fix home free cam

- migration UMML db edit to Hchimi

- fix StoryRace pause

Edited September 10 by goofyahhcats

[CaaSa88]

21 hours ago, einnarr said:

Model change for Matikanefukukitaru.

Half-nude and full-nude MODs already exist, but I'm planning to keep editing little by little.

Matikanefukukitaru.rar 13.38 MB · 1 download

that marvelous sunday soo ~~~ Marvelous  !!!!!!!!!  

[negcham1942]

There was some unnatural movement with the smaller breasts, but I subsequently adjusted the parameters so that while the large breasts sway, the smaller ones do not move as much.

Ideally, I'd like to adjust the parameters for each character—or even for each bust size.

[konkichi]

While tweaking the skin textures, I added a lewd crest that glows in the dark.

[konkichi]

 全てのポニーにハートの目を追加しました。

 

[lhac]

On 7/9/2026 at 12:19 AM, einnarr said:

Silence_Suzuka.
Made this as a test, but the slender body is hers...

A dream she had…?

 

Silence_Suzuka_fix.rar 10.17 MB · 19 downloads Silence_Suzuka_fix EX.rar 10.16 MB · 18 downloads

 

是非ニシノフラワー版を要望します

[peachy.keane]

On 9/12/2026 at 7:33 AM, negcham1942 said:

There was some unnatural movement with the smaller breasts, but I subsequently adjusted the parameters so that while the large breasts sway, the smaller ones do not move as much.

Ideally, I'd like to adjust the parameters for each character—or even for each bust size.

My first choice would have been to edit the weight painting of the breasts on the models themselves.

I'm probably just "model-pilled" from working on my own default body replacement though-- I'm sure that would be time-consuming and unnecessary...