Umamusume: Pretty Derby (Steam)

[einnarr]

2 hours ago, 楪蘭楓 said:

I tried to put the face of Duo Svol on Mayano Top Gun, but the expression was a bit broken. After all, the face shape and eyes are different, so there is no way to perfectly map it.

But interestingly, the game didn’t encounter any errors at all.

It would be great if I could swap the mob_Uma_Musume's head too, the same way a body swap works...
Just out of pure curiosity,but what was the process you used to change Still_In_Love to Rice_Shower previously?

I was surprised to find that in this game, things somehow just work as long as the bones and vertex groups are aligned...

[楪蘭楓]

9 hours ago, einnarr said:

It would be great if I could swap the mob_Uma_Musume's head too, the same way a body swap works...
Just out of pure curiosity,but what was the process you used to change Still_In_Love to Rice_Shower previously?

I was surprised to find that in this game, things somehow just work as long as the bones and vertex groups are aligned...

For regular characters, a full set replacement works fine.

For mob characters, the face and hair are assembled separately. This wasn’t studied in depth—just based on testing results: if they’re simply inserted into a regular character instead of doing a full replacement, facial expressions may behave incorrectly.

[ponyonyo]

On 3/24/2026 at 2:20 PM, einnarr said:

 

Utilize umaviewer.
For example, if you select a common costume(15), you will have the following assets:

pfb_bdy1015_00_bust_cloth00
(pfb_bdy1015_00_cloth00 is skirt)

Rewrite this asset directly.

"Sp_Ch_Bust0_L_00" "Sp_Ch_Bust0_R_00"
_stiffnessForce 245
_dragForce 300
_gravity 10
_limitAngleMin X 25
_limitAngleMax X 08

"Sp_Ch_Bust0_L_01""Sp_Ch_Bust0_R_01"
_stiffnessForce 75
_dragForce 280
_gravity 10
_limitAngleMin X 14
_limitAngleMin Y 12
_limitAngleMax X 14
_limitAngleMax Y 12

Adjusting it to about half of the original value should double the shaking.
There is also a file, but since it is a DMM environment, it may not be possible to use it as is.

DMM_Ver.rar 6.56 kB · 22 downloads

Comparison video.rar 11.71 MB · 22 downloads

Sorry for the machine translation.

 

This mod is so great,
I tried for a month based on the information, but no matter what I did, I got an error when I started LIVE and I couldn't make it.
Costume 15 for bustsize2 or 3
Or is it possible to get other common costumes as files?

[Protokoll]

On 4/28/2026 at 6:23 AM, goofyahhcats said:

can't
swimsuit dont have chibis
if u swap then softlock

Damm. Yeah i read that chibis are a must, but i didn't knew the chibis were associated to the G1 too. How far can i get them to wear their swimsuit without getting softlocked? If its possible i mean

[dsvelpeak]

On 4/28/2026 at 12:00 AM, Dandrone said:

 

Aww she's adorable! Mind me asking why she's your favorite npc uma?

It kinda just happened one day!! Saw her racing, she looked cute, spunky and her face, hair and colors all go really well together

[dsvelpeak]

On 4/28/2026 at 8:49 AM, 楪蘭楓 said:

I tried to put the face of Duo Svol on Mayano Top Gun, but the expression was a bit broken. After all, the face shape and eyes are different, so there is no way to perfectly map it.

But interestingly, the game didn’t encounter any errors at all.

That's interesting, im very glad its possible even if not perfectly so!!

[goofyahhcats]

2 hours ago, Protokoll said:

Damm. Yeah i read that chibis are a must, but i didn't knew the chibis were associated to the G1 too. How far can i get them to wear their swimsuit without getting softlocked? If its possible i mean

need put swimsuit model into 2 stars costume
but that require fix bindpose to 20+ model

[Dandrone]

I hardest part about editing uma meshes is the Unity section (at least for me). I'm using the new script linked on page 1. And when I move my meshes to the scene section on the left (right before you put them in the prefab section) the edited mesh gets giant. I looked it up on google and it said I could easily fix it with scale factor option on the right. So I did that (set it to 0.001), and it ended up looking pixelated. I remember the Meekuru guide saying it can look off during Unity steps so I figured I should just continue.

 

 

After going through the steps to finish the Unity and UABEA section I end up getting this cursed af model in Umaviewer LOL

 

 

 

I checked blender and my scale settings for import fbx (set to 1.000) and export fbx (set to 1.00) numbers look good. I'm using Unity 2022.3.62f2 as well. (I removed skirt and some of the jacket from Maruzensky half nude mod). I honestly wouldn't mind paying for a video (a video of someone doing the Unity section with no voice over and no text explaining the steps) that way I can follow along and learn what I'm doing wrong. Or maybe linking some youtube tutorials that are useful for the unity section.

 

Thanks for taking the time to read this. Peace peace!

Edited April 30 by Dandrone

[goofyahhcats]

3 hours ago, Dandrone said:

I hardest part about editing uma meshes is the Unity section (at least for me). I'm using the new script linked on page 1. And when I move my meshes to the scene section on the left (right before you put them in the prefab section) the edited mesh gets giant. I looked it up on google and it said I could easily fix it with scale factor option on the right. So I did that (set it to 0.001), and it ended up looking pixelated. I remember the Meekuru guide saying it can look off during Unity steps so I figured I should just continue.

 

 

After going through the steps to finish the Unity and UABEA section I end up getting this cursed af model in Umaviewer LOL

 

 

 

I checked blender and my scale settings for import fbx (set to 1.000) and export fbx (set to 1.00) numbers look good. I'm using Unity 2022.3.62f2 as well. (I removed skirt and some of the jacket from Maruzensky half nude mod). I honestly wouldn't mind paying for a video (a video of someone doing the Unity section with no voice over and no text explaining the steps) that way I can follow along and learn what I'm doing wrong. Or maybe linking some youtube tutorials that are useful for the unity section.

 

Thanks for taking the time to read this. Peace peace!

if you imported FBX 100% scale then change scale export to 0.01
also uncheck convert unit in unity

[goofyahhcats]

UMML 1.4.3

updated platform check:
- use PC-s as priority

- otherwise DMM/GLO
- Non-platform such as "PC" / "assets" / mod folder that not contain android asset thing

Edited May 1 by goofyahhcats

[wolffang719]

Even with the most recent update I can't get UMML to work I can change some busts but trying to change anything else causes the game to load forever when trying to show any affected uma

can someone please help me out here?

[goofyahhcats]

11 minutes ago, wolffang719 said:

Even with the most recent update I can't get UMML to work I can change some busts but trying to change anything else causes the game to load forever when trying to show any affected uma

can someone please help me out here?

wrong combination height shape bust
u can't set anyone to bigger cuz model not exist
 

[wolffang719]

2 minutes ago, goofyahhcats said:

wrong combination height shape bust
u can't set anyone to bigger cuz model not exist
 

okay I think i understand that, I haven't tried going over 4 or anything

 

Edited May 2 by wolffang719

[peachy.keane]

You can (attempt) to set custom values in UMML? I thought there were only the dropdown menu options.

[goofyahhcats]

9 hours ago, peachy.keane said:

You can (attempt) to set custom values in UMML? I thought there were only the dropdown menu options.

the only available value in enum

[peachy.keane]

3 hours ago, goofyahhcats said:

the only available value in enum

ahh, thought so.

Though, that makes me wonder why the new skin color that was added in JP for foreign black umas is unavailable in UMML?

Is there some kinda code in place that makes it exclusive for MOB characters, or something?

[Edelike]

On 2026/3/24 at 午後2時20分, einnarr said:

 

umaviewer を利用してください。
例えば、一般的なコスチューム (15) を選択すると、次のアセットが表示されます。

pfb_bdy1015_00_bust_cloth00
(pfb_bdy1015_00_cloth00 はスカートです)

このアセットを直接書き換えてください。

"Sp_Ch_Bust0_L_00" "Sp_Ch_Bust0_R_00"
_stiffnessForce 245
_dragForce 300
_gravity 10
_limitAngleMin X 25
_limitAngleMax X 08

"Sp_Ch_Bust0_L_01""Sp_Ch_Bust0_R_01"
_stiffnessForce 75
_dragForce 280
_gravity 10
_limitAngleMin X 14
_limitAngleMin Y 12
_limitAngleMax X 14
_limitAngleMax Y 12

元の値の約半分に調整すると、揺れが2倍になるはずです。
ファイルもありますが、DMM環境なので、そのままでは使用できない可能性があります。

DMM_Ver.rar 6.56 kB ・ ダウンロード数：27件

比較動画.rar 11.71 MB ・ ダウンロード数：27件

Dear einnarr.
Excuse me. I apologize for using machine translation.

I tried school swimsuit pfb_bdy0004_00_bustX_cloth00.
I Adjusted it to about half of the original value should double the shaking.
But, I can not recompile? or Re-encryption? for Eng enumeration(For example 7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST from steam Jp Ver.)

You customed DMM_Ver.rar(DA3EVSL4E4OP5OVNBZU3FU562ILOIH47).
How to recompile?

My Environment
・Jp steam
・I want use for umaviewer
・I not used modloader
・I tried overwrite 7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST etc...

[goofyahhcats]

3 hours ago, Edelike said:

Dear einnarr.
Excuse me. I apologize for using machine translation.

I tried school swimsuit pfb_bdy0004_00_bustX_cloth00.
I Adjusted it to about half of the original value should double the shaking.
But, I can not recompile? or Re-encryption? for Eng enumeration(For example 7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST from steam Jp Ver.)

You customed DMM_Ver.rar(DA3EVSL4E4OP5OVNBZU3FU562ILOIH47).
How to recompile?

My Environment
・Jp steam
・I want use for umaviewer
・I not used modloader
・I tried overwrite 7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST etc...

DMM & Steam JPN share same assets
u need decrypt assets first

[Edelike]

1時間前、goofyahhcatsさんが言いました：

DMMとSteam JPNは同じアセットを共有しています
まずアセットを復号化する必要があります

Thankful for your kindness, goofyahhcats. Sorry for my broken English.

Of course. My procedure is...
1.Start up UmaViewer.
2.Select swimsuit of bust0 to 4 Charactor(For example, click ID 1002-1117-1088-1092-1116)and push Loaded Assets with export.
3.Can watch at C:\Users\user\Desktop\(newfolder)\3d\chara\body\bdy0004_00\clothes .
4.Edited pfb_bdy0004_00_bustX_cloth00 by UABEA, marking as edit that.
(Mx.einnarr said, Adjusting it to about half of the original value should double the shaking.)
5.I edited pfb_bdy0004_00_bustX_cloth00 simply, but I can not convert to
(Maybe data)
0.PDBU7Q7UBQDGKTBM3AABFTYI7JVRPO5A
1.SOMSFRA4PZF5DGGVZZW4BVG3AL5KMRHT
2.7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST
3.JWFF7GPGB6EDGWKL35M7GAXK46VIRJD4
4.CLLSADEN4VTZFQCGHW3ZJ44RTCJT7ABE
It mean "I can not recompile? or Re-encryption?"

"u need decrypt assets first". I understand and can not decrypt. This post is "How to decrypt edited data(is it assets?)" .

Jp web bulletin board said "Decryption system is yet".
However, Mx.einnarr supply "DA3EVSL4E4OP5OVNBZU3FU562ILOIH47(pfb_bdy1015_00_bust_cloth00)"

Can we decrypt? How to use?

[goofyahhcats]

35 minutes ago, Edelike said:

Thankful for your kindness, goofyahhcats. Sorry for my broken English.

Of course. My procedure is...
1.Start up UmaViewer.
2.Select swimsuit of bust0 to 4 Charactor(For example, click ID 1002-1117-1088-1092-1116)and push Loaded Assets with export.
3.Can watch at C:\Users\user\Desktop\(newfolder)\3d\chara\body\bdy0004_00\clothes .
4.Edited pfb_bdy0004_00_bustX_cloth00 by UABEA, marking as edit that.
(Mx.einnarr said, Adjusting it to about half of the original value should double the shaking.)
5.I edited pfb_bdy0004_00_bustX_cloth00 simply, but I can not convert to
(Maybe data)
0.PDBU7Q7UBQDGKTBM3AABFTYI7JVRPO5A
1.SOMSFRA4PZF5DGGVZZW4BVG3AL5KMRHT
2.7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST
3.JWFF7GPGB6EDGWKL35M7GAXK46VIRJD4
4.CLLSADEN4VTZFQCGHW3ZJ44RTCJT7ABE
It mean "I can not recompile? or Re-encryption?"

"u need decrypt assets first". I understand and can not decrypt. This post is "How to decrypt edited data(is it assets?)" .

Jp web bulletin board said "Decryption system is yet".
However, Mx.einnarr supply "DA3EVSL4E4OP5OVNBZU3FU562ILOIH47(pfb_bdy1015_00_bust_cloth00)"

Can we decrypt? How to use?

DA3EVSL4E4OP5OVNBZU3FU562ILOIH47 is encrypted assets

if u mean re-encrypt, u need UmaDecryptor
or you can load unencrypted asset with UMML load assets (manual)
(video on tutor.zip cuz idk how to reencode to webp)

tutor.zip

Edited May 6 by goofyahhcats

[einnarr]

1 hour ago, Edelike said:

Thankful for your kindness, goofyahhcats. Sorry for my broken English.

Of course. My procedure is...
1.Start up UmaViewer.
2.Select swimsuit of bust0 to 4 Charactor(For example, click ID 1002-1117-1088-1092-1116)and push Loaded Assets with export.
3.Can watch at C:\Users\user\Desktop\(newfolder)\3d\chara\body\bdy0004_00\clothes .
4.Edited pfb_bdy0004_00_bustX_cloth00 by UABEA, marking as edit that.
(Mx.einnarr said, Adjusting it to about half of the original value should double the shaking.)
5.I edited pfb_bdy0004_00_bustX_cloth00 simply, but I can not convert to
(Maybe data)
0.PDBU7Q7UBQDGKTBM3AABFTYI7JVRPO5A
1.SOMSFRA4PZF5DGGVZZW4BVG3AL5KMRHT
2.7RZQ6UAQN52YMMY4VCUJCBQPJPKOX4ST
3.JWFF7GPGB6EDGWKL35M7GAXK46VIRJD4
4.CLLSADEN4VTZFQCGHW3ZJ44RTCJT7ABE
It mean "I can not recompile? or Re-encryption?"

"u need decrypt assets first". I understand and can not decrypt. This post is "How to decrypt edited data(is it assets?)" .

Jp web bulletin board said "Decryption system is yet".
However, Mx.einnarr supply "DA3EVSL4E4OP5OVNBZU3FU562ILOIH47(pfb_bdy1015_00_bust_cloth00)"

Can we decrypt? How to use?

For encrypting and decrypting files, you will need to use Uma_Decryptor!
decrypt using Uma_Decryptor, edit the decrypted file, then encrypt again using Uma_Decryptor.
A detailed tutorial guide on how to use Uma_Decryptor has been graciously provided by the respected tool author, 楪蘭楓 (RanKaeder).

[Edelike]

"u need UmaDecryptor"
"For encrypting and decrypting files, you will need to use Uma_Decryptor!
decrypt using Uma_Decryptor, edit the decrypted file, then encrypt again using Uma_Decryptor."

Ah. But, I have been clushed UmaDecryptor. Can not start up exe, starting with black dos-commands screen and right away clush.

It looks like DL pages,

NoName 2026-01-03
請問一下，使用方式是下載UmaDecryptor.exe
然後開啟嗎?
我開啟之後沒有反應，而且遊戲無法啟動了

Translate Eng.
Excuse me, does the procedure involve downloading and running UmaDecryptor.exe?
I tried running it, but nothing happened, and the game won't start.

I installed .NET 8 Runtime. Is something missing?

My Environment
・Main PC steam Jp
F:\SteamLibrary\steamapps\common\UmamusumePrettyDerby_Jpn\UmamusumePrettyDerby_Jpn_Data\Persistent\dat
・Sub PC DMM Jp
C:\Umamusume\umamusume_Data\Persistent\dat(Is it default folder?)

I am worried about same symptoms main and sub PC. How to start up?
(UMML too not start up. "UMMl.py" click execution or drag to cmd, What are you select any apl and open. I select Pyton 3.10.11. But appear Modify Setup =I installed Python for stable diffusion, it is all right.)

[einnarr]

55 minutes ago, Edelike said:

"u need UmaDecryptor"
"For encrypting and decrypting files, you will need to use Uma_Decryptor!
decrypt using Uma_Decryptor, edit the decrypted file, then encrypt again using Uma_Decryptor."

Ah. But, I have been clushed UmaDecryptor. Can not start up exe, starting with black dos-commands screen and right away clush.

It looks like DL pages,

NoName 2026-01-03
請問一下，使用方式是下載UmaDecryptor.exe
然後開啟嗎?
我開啟之後沒有反應，而且遊戲無法啟動了

Translate Eng.
Excuse me, does the procedure involve downloading and running UmaDecryptor.exe?
I tried running it, but nothing happened, and the game won't start.

I installed .NET 8 Runtime. Is something missing?

My Environment
・Main PC steam Jp
F:\SteamLibrary\steamapps\common\UmamusumePrettyDerby_Jpn\UmamusumePrettyDerby_Jpn_Data\Persistent\dat
・Sub PC DMM Jp
C:\Umamusume\umamusume_Data\Persistent\dat(Is it default folder?)

I am worried about same symptoms main and sub PC. How to start up?
(UMML too not start up. "UMMl.py" click execution or drag to cmd, What are you select any apl and open. I select Pyton 3.10.11. But appear Modify Setup =I installed Python for stable diffusion, it is all right.)

It might work if you run it directly from cmd (Win + R)...
Run UmaDecryptor.exe directly by entering the full path to wherever you have saved it.
Don't forget to specify the paths for -i and -o as well.

[Edelike]

28分前、einnarrはこう言いました。

コマンドプロンプト（Windowsキー + R）から直接実行すればうまくいくかもしれません。
UmaDecryptor.exeを直接実行するには、保存した場所へのフルパスを入力してください。
-i と -o のパスも忘れずに指定してください。

Wow. It's amazing!

win+R
ctrl+shift+enter+cmd

So, that means...For example:
F:\UmaDecryptor.exe uma-dir -i "F:\SteamLibrary\steamapps\common\UmamusumePrettyDerby_Jpn\UmamusumePrettyDerby_Jpn_Data\Persistent" -o "D:\UMA_Full_Decrypted" -v
you said!

I don't know if an error will occur, but I decided to just watch over them.

Many thanks your kind!

[peachy.keane]

I was curious, so I decided to do a little digging...

 

This chart shows how many Trainee/NPC characters use each of the different generic body shapes.

 

• Fields highlighted in  yellow  account for 75% of all non-MOB characters. (speaking of MOB characters...)
  • MOB girls only use the 1_0_? body shapes. (default height, standard build, any breast size)
  • In fact, the largest bust size for that body shape, 1_0_4, is exclusive to mob girls.
  • So, adding 1_0_0 and 1_0_4 to the highlighted 8 body types accounts for 100% of the MOB girls too.
  • Just those 10 body shapes encompass ~900 characters (128 non-MOB & all 780+ MOB)

 

• Fields marked  n/a  are bodies that are not actually in the game files.
  • Despite the obvious system here, not every mesh exists. Of the 45 potential bodies, only 28 exist.
  • Most notably, the "Short" height ONLY has "standard" variations, entailing all 5 breast sizes.
  • Also, although they DO exist in the game files, 0_0_1, 0_0_2, 0_0_4, 1_1_4, and 2_0_0 are entirely unused.

 

Additionally, though the chart shows body shapes, I would like to point out the following about body colors:

• "White" and "Peach" (colors 0 & 1) account for 85% of all non-MOB characters. (It's a pretty even split, 71:74)
• "Yellow" (color 2) is used by 19 non-MOB characters, about 11%.
• "Brown" (color 3) is used by only 5 non-MOB characters, less-than 3%. (And only TWO of them are Trainees!)
• "Black" (color 4) is not used by ANY non-MOB characters; so it is also exclusive to MOB girls.

Edited May 8 by peachy.keane