Ys VIII: Lacrimosa of Dana

[amorrow28]

40 minutes ago, Cutepatatas said:

 

Could you recommend which of the newer DLC nude mods would be the best ones to use for Dana and Laxia? I’ll use those to replace their default costumes directly instead.

 

Not 100% sure, but it looks like those two are the main characters with updated mods aside from the NPCs.

 

Thank you again!

 

Yeah I tried to look through my files and they're a complete mess.  I don't think I have organized / named files of the new costumes except in the .xai files, unfortunately.  Here are the nudes though:

 

Ys8NewNudesRawIT3Files.7z

 

c002 is Laxia, c005_p/c007/c008 is Dana (spoiler)

 

Spoiler

c005_p/c007/c008 is Dana's Iclucian, Gratika and Luminous forms

 

In regards of the non-nude costumes, just look at the banner and see if any of the outfits pique your interest.

 

Also, looking through my notes, I remember now that you had to edit the .exe to defeat a protection against adding new DLC.  So yeah, I'm betting the Switch version has something analogous.

[Cutepatatas]

17 hours ago, amorrow28 said:

 

Yeah I tried to look through my files and they're a complete mess.  I don't think I have organized / named files of the new costumes except in the .xai files, unfortunately.  Here are the nudes though:

 

Ys8NewNudesRawIT3Files.7z 11.44 MB · 1 download

 

c002 is Laxia, c005_p/c007/c008 is Dana (spoiler)

 

  Reveal hidden contents

c005_p/c007/c008 is Dana's Iclucian, Gratika and Luminous forms

 

In regards of the non-nude costumes, just look at the banner and see if any of the outfits pique your interest.

 

Also, looking through my notes, I remember now that you had to edit the .exe to defeat a protection against adding new DLC.  So yeah, I'm betting the Switch version has something analogous.

Hey, thanks!

I ended up going with Half Nude Dana and Full Nude Laxia. I also included c007/c008 for Dana as well.
 

I’m not sure if I can share the actual Switch mod here since the repacked data.dat is around 15GB, so I’ll attach everything I learned from this project instead for those interested on applying the mod for the switch.
 

Thank you again!

Ys8 Switch Modding Full Archive Notes.pdf

Edited May 7 by Cutepatatas

[osatan]

12 minutes ago, Cutepatatas said:

Hey, thanks!

I ended up going with Half Nude Dana and Full Nude Laxia. I also included c007/c008 for Dana as well.
 

I’m not sure if I can share the actual Switch mod here since the repacked data.dat is around 15GB, so I’ll attach everything I learned from this project instead for those interested on applying the mod for the switch.
 

Thank you again!

Ys8 Switch Modding Full Archive Notes.pdf 100.83 kB · 0 downloads

That's wonderful. I really admire your hard work. Keep up the great work.

[amorrow28]

3 hours ago, Cutepatatas said:

Hey, thanks!

I ended up going with Half Nude Dana and Full Nude Laxia. I also included c007/c008 for Dana as well.
 

I’m not sure if I can share the actual Switch mod here since the repacked data.dat is around 15GB, so I’ll attach everything I learned from this project instead for those interested on applying the mod for the switch.
 

Thank you again!

Ys8 Switch Modding Full Archive Notes.pdf 100.83 kB · 1 download

This is great info. I’d love to add some of this to my Ys 8 modding wiki with your permission and with credit to you, if you agree!

[Cutepatatas]

13 minutes ago, amorrow28 said:

This is great info. I’d love to add some of this to my Ys 8 modding wiki with your permission and with credit to you, if you agree!

I'd be honored. 🫡

 

I'll revise this to be more user friendly and cut out some parts that aren't really necessary. 

Edited May 8 by Cutepatatas

[amorrow28]

1 hour ago, Cutepatatas said:

I'd be honored. 🫡

 

I'll revise this to be more user friendly and cut out some parts that aren't really necessary. 

No worries, I’ll extract what is needed!

[Cutepatatas]

7 minutes ago, amorrow28 said:

No worries, I’ll extract what is needed!

I just finished it 😂 Should be more beginner friendly now.

 

Ys8_Beginner_Friendly_Switch_Modding_Guide.pdf

[amorrow28]

3 hours ago, Cutepatatas said:

I just finished it 😂 Should be more beginner friendly now.

 

Ys8_Beginner_Friendly_Switch_Modding_Guide.pdf 18.21 kB · 1 download

 

Thank you!  I adapted your guide for the wiki, here.  I tried to simplify it even further.

 

A question though, now that I look carefully at your guide - you are replacing a ton of files with Reimport2 mode.  How large is the original data.dat?  To my understanding, QuickBMS does not replace files - it appends them and replaces the pointer.  This means the original file and the replacement file are both in data.dat and the table of contents only has a link to the replacement.  (The original is now dead weight in the file.)  It is meant to be used to replace only modded files, so it should not say it is replacing 28635 files nor should it take more than 10 minutes.  My guess is that the final file is probably double the size of the original using the method you are using now.

 

You actually should not need to extract the originals at all.  As the tool is meant to be used, just have a folder with your mods alone, e.g. `mod_data/chr/pc` with the 4 .it3 files in that folder (and nothing else), then run `quickbms_4gb_files.exe -w -r -r fafullfs.bms data.dat data` and it will insert only 4 files, leaving everything else alone.  data.dat should be a little bit bigger, but not much bigger.

[Cutepatatas]

3 hours ago, amorrow28 said:

 

Thank you!  I adapted your guide for the wiki, here.  I tried to simplify it even further.

 

A question though, now that I look carefully at your guide - you are replacing a ton of files with Reimport2 mode.  How large is the original data.dat?  To my understanding, QuickBMS does not replace files - it appends them and replaces the pointer.  This means the original file and the replacement file are both in data.dat and the table of contents only has a link to the replacement.  (The original is now dead weight in the file.)  It is meant to be used to replace only modded files, so it should not say it is replacing 28635 files nor should it take more than 10 minutes.  My guess is that the final file is probably double the size of the original using the method you are using now.

 

You actually should not need to extract the originals at all.  As the tool is meant to be used, just have a folder with your mods alone, e.g. `mod_data/chr/pc` with the 4 .it3 files in that folder (and nothing else), then run `quickbms_4gb_files.exe -w -r -r fafullfs.bms data.dat data` and it will insert only 4 files, leaving everything else alone.  data.dat should be a little bit bigger, but not much bigger.

Ahh, got it. That makes sense.

 

In my case, the final size didn’t actually double. The original dump was around 14.63GB, and the modded "data.dat" ended up around 14.72GB, so it only increased by roughly 90MB.

 

So I think the bigger issue with my method wasn’t file size, but speed. Since I pointed QuickBMS at the full extracted "data_fafullfs" folder, it had to scan/process everything and reported "28635 files reimported", which is probably why it took so long.

 

Your mod-only folder method makes way more sense:

 

mod_data\chr\pc\

 

with only the changed .it3 files inside. I honestly didn’t realize you could inject only the changed files like that — I thought I had to rebuild/rewrite the archive each time.

Funny enough, I only started thinking about direct injection yesterday while messing with Ys IX’s VFS archive, since I still can’t properly extract it yet.

I just tried your method and it did make injecting the mod files much faster!! What took 30mins on HDD / 10mins on SSD took only a seconds with this!! Also, I just finished reading your wiki and it really made things much simpler and easier to follow. Truly a work of a master on his crafts.

 

Thanks for explaining it! this is exactly why you’re the master and my idol. 😄 I’m still a beginner with this stuff, so most of what I do is based on whatever I can gather, read, and test.

 

I don’t even know how to use Blender yet, so for now I mostly focus on porting existing mods and getting them working on Switch rather than doing actual modeling work.

Edited May 8 by Cutepatatas

[amorrow28]

6 hours ago, Cutepatatas said:

Ahh, got it. That makes sense.

 

In my case, the final size didn’t actually double. The original dump was around 14.63GB, and the modded "data.dat" ended up around 14.72GB, so it only increased by roughly 90MB.

 

So I think the bigger issue with my method wasn’t file size, but speed. Since I pointed QuickBMS at the full extracted "data_fafullfs" folder, it had to scan/process everything and reported "28635 files reimported", which is probably why it took so long.

 

Your mod-only folder method makes way more sense:

 

mod_data\chr\pc\

 

with only the changed .it3 files inside. I honestly didn’t realize you could inject only the changed files like that — I thought I had to rebuild/rewrite the archive each time.

Funny enough, I only started thinking about direct injection yesterday while messing with Ys IX’s VFS archive, since I still can’t properly extract it yet.

I just tried your method and it did make injecting the mod files much faster!! What took 30mins on HDD / 10mins on SSD took only a seconds with this!! Also, I just finished reading your wiki and it really made things much simpler and easier to follow. Truly a work of a master on his crafts.

 

Thanks for explaining it! this is exactly why you’re the master and my idol. 😄 I’m still a beginner with this stuff, so most of what I do is based on whatever I can gather, read, and test.

 

I don’t even know how to use Blender yet, so for now I mostly focus on porting existing mods and getting them working on Switch rather than doing actual modeling work.

 

Idol sounds a bit too much but I'm glad I can be helpful!  BTW DBI has an "MTP Responder" that also supports splitting 4GB+ files, maybe that would make transfers faster than USB while still doing the file splits.  I don't have a modded switch so I can't test these things but I would think it would be possible to figure out how it works and just split the files on your computer then copy to the SD to make things much faster...

[Cutepatatas]

1 hour ago, amorrow28 said:

 

Idol sounds a bit too much but I'm glad I can be helpful!  BTW DBI has an "MTP Responder" that also supports splitting 4GB+ files, maybe that would make transfers faster than USB while still doing the file splits.  I don't have a modded switch so I can't test these things but I would think it would be possible to figure out how it works and just split the files on your computer then copy to the SD to make things much faster...

MTP Responder is normally the way I transfer files, and it was the first thing I tried. However, after dropping the file in, the connection would just drop after a few seconds with no error message.

 

I assumed it was either because my SD card is FAT32, or because the file was just too big for DBI to handle (That’s what she said. 😏)

 

Also, we don’t really have to reboot the device every time after copying "data.dat" to the Switch. I mostly did it just for good measure, but honestly it just adds more time to an already painfully long testing process. 😅

Edited May 8 by Cutepatatas

[amorrow28]

52 minutes ago, Cutepatatas said:

MTP Responder is normally the way I transfer files, and it was the first thing I tried. However, after dropping the file in, the connection would just drop after a few seconds with no error message.

 

I assumed it was either because my SD card is FAT32, or because the file was just too big for DBI to handle (That’s what she said. 😏)

 

Also, we don’t really have to reboot the device every time after copying "data.dat" to the Switch. I mostly did it just for good measure, but honestly it just adds more time to an already painfully long testing process. 😅

ahh, that makes sense. I’ll update the wiki.

[yishu7]

Thank you, great author.🥰 Dana's naked breasts are too small. Could you make them a bit bigger? I'm sorry my English is not good.

[amorrow28]

10 hours ago, yishu7 said:

Thank you, great author.🥰 Dana's naked breasts are too small. Could you make them a bit bigger? I'm sorry my English is not good.

I’m sorry, I do not accept requests or commissions!

[kombat73]

On 5/7/2026 at 10:23 PM, Cutepatatas said:

I just finished it 😂 Should be more beginner friendly now.

 

Ys8_Beginner_Friendly_Switch_Modding_Guide.pdf 18.21 kB · 10 downloads

Could you share your folder with the mods for Switch? please :c

[amorrow28]

On 6/18/2026 at 11:22 AM, kombat73 said:

Could you share your folder with the mods for Switch? please :c

Try using these mod files with this guide.  EDIT: See next post.

Edited June 21 by amorrow28

[amorrow28]

On 6/18/2026 at 11:22 AM, kombat73 said:

Could you share your folder with the mods for Switch? please :c

 

Ok, I decided to make a switch version of my mod.  Thank you to @Cutepatatas for doing a lot of research into how to mod Ys 8 on the switch.  This version has mods for Dana, Laxia and 6 of the castaways.  The castaways (Alison, Dina, Griselda, Kathleen, Miralda and Nia) are bottomless.  By default, Dana is mostly nude and Laxia is bottomless, and their equippable alternate costumes (Noble Shaman and Pretty Lady) are fully nude.  If you prefer fully nude to be the default for Dana and Laxia, overwrite the files in the data folder with the files in the 'full_nude_alternates/data' folder before integrating into data.dat

 

Ys8_Mod_switch_version.7z

 

How to install:

• Put the contents of Ys8_Mod_switch_version.7z into an empty folder.
• Place data.dat from Ys VIII: Lacrimosa of DanaYs IX: Monstrum Nox (Switch 1 version) into the same folder.  (I do not have a modded switch, I have no idea how to dump this file, don't ask me.)
• Run ys8nx_insert_into_dat.exe (or ys8nx_insert_into_dat.py if you are using Linux/MacOS/etc).
• Place the new data.dat into your Ys VIII: Lacrimosa of Dana romfs folder.  (According to cutepatatas it is sd:/atmosphere/contents/01007F200B0C0000/romfs/data.dat for the English language release).  Note that data.dat >4GB so if your SD card is formatted with FAT32 then you will need to FTP the file to DBI, according to cutepatatas.
• Enjoy!

Again, thank you to @coomi and @lakovic for the nude mods I used as a base, and to the brilliant folks at the Kiseki Modding Discord for help in reverse-engineering the IT3 format.  Thank you to Luigi Auriemma (https://aluigi.altervista.org/quickbms.htm) for the scripts that I used to reverse engineer the data.dat file.

 

Note: None of the files are changed from the PC version, I just packaged them up for the switch.  These are obviously not thoroughly tested since I do not have a modded switch, so I would appreciate it if someone tells me if they work correctly.  EDIT: Confirmed working, see next post.

Edited June 21 by amorrow28

[Cutepatatas]

20 hours ago, amorrow28 said:

 

Ok, I decided to make a switch version of my mod.  Thank you to @Cutepatatas for doing a lot of research into how to mod Ys 8 on the switch.  This version has mods for Dana, Laxia and 6 of the castaways.  The castaways (Alison, Dina, Griselda, Kathleen, Miralda and Nia) are bottomless.  By default, Dana is mostly nude and Laxia is bottomless, and their equippable alternate costumes (Noble Shaman and Pretty Lady) are fully nude.  If you prefer fully nude to be the default for Dana and Laxia, overwrite the files in the data folder with the files in the 'full_nude_alternates/data' folder before integrating into data.dat

 

Ys8_Mod_switch_version.7z 30.78 MB · 1 download

 

How to install:

• Put the contents of Ys8_Mod_switch_version.7z into an empty folder.
• Place data.dat from Ys VIII: Lacrimosa of DanaYs IX: Monstrum Nox (Switch 1 version) into the same folder.  (I do not have a modded switch, I have no idea how to dump this file, don't ask me.)
• Run ys8nx_insert_into_dat.exe (or ys8nx_insert_into_dat.py if you are using Linux/MacOS/etc).
• Place the new data.dat into your Ys VIII: Lacrimosa of Dana romfs folder.  (According to cutepatatas it is sd:/atmosphere/contents/01007F200B0C0000/romfs/data.dat for the English language release).  Note that data.dat >4GB so if your SD card is formatted with FAT32 then you will need to FTP the file to DBI, according to cutepatatas.
• Enjoy!

Again, thank you to @coomi and @lakovic for the nude mods I used as a base, and to the brilliant folks at the Kiseki Modding Discord for help in reverse-engineering the IT3 format.  Thank you to Luigi Auriemma (https://aluigi.altervista.org/quickbms.htm) for the scripts that I used to reverse engineer the data.dat file.

 

Note: None of the files are changed from the PC version, I just packaged them up for the switch.  These are obviously not thoroughly tested since I do not have a modded switch, so I would appreciate it if someone tells me if they work correctly.

Confirmed working on the Switch! 🎉

 

I friggin' love you man!! you're the best!!

 

Thank you so much for porting everything over to Switch and for all the work you've put into this game and its mods. It made a lot of people happy, myself included.

 

I wanted to give you something in return, but then I remembered... I'm poor. 🤣

 

So all I can offer is my gratitude and appreciation. Best wishes to you, and I hope you continue to find success in whatever projects you take on in the future!

 

Thanks again!

 

[amorrow28]

2 minutes ago, Cutepatatas said:

Confirmed working on the Switch! 🎉

 

I friggin' love you man!! you're the best!!

 

Thank you so much for porting everything over to Switch and for all the work you've put into this game and its mods. It made a lot of people happy, myself included.

 

I wanted to give you something in return, but then I remembered... I'm poor. 🤣

 

So all I can offer is my gratitude and appreciation. Best wishes to you, and I hope you continue to find success in whatever projects you take on in the future!

 

Thanks again!

 

 

Fantastic!  I'm glad my work won't go to waste.  🙂  Enjoy the game, and thanks for doing the experimental work to figure out the logistics!

[大人物]

2026年6月21日上午9点43分，amorrow28说：

 

好的，我决定制作一个我的模组的切换版本。谢谢你@可愛做了很多关于如何在开关上修改Ys 8的研究。这个版本有Dana、Laxia和6个漂流者的模组。漂流者（Alison、Dina、Griselda、Kathleen、Miralda和Nia）是無底的。默认情况下，Dana大多是裸体的，Laxia是无底的，他们可装备的备用服装（Noble Shaman和Pretty Lady）是全裸的。如果您更喜欢全裸作为Dana和Laxia的默认值，请在集成到data.dat之前用“full_nude_alternates/data”文件夹中的文件覆盖数据文件夹中的文件

 

Ys8_Mod_switch_版本.7z 30.78兆字节·6次下载

 

如何安装：

• 将Ys8_Mod_switch_version.7z的内容放入一个空文件夹中。
• 将DanaYs IX的Ys VIII: Lacrimosa: Monstrum Nox（Switch 1版本）中的data.dat放入同一文件夹中。（我没有修改过的开关，我不知道如何转储此文件，别问我。）
• 运行ys8nx_insert_into_dat.exe（如果您使用的是Linux/MacOS/等，则运行ys8nx_insert_into_dat.py）。
• 将新的data.dat放入您的Ys VIII: Lacrimosa of Dana romfs文件夹中。（根据cutepatatas，英文版本是sd:/atmosphere/contents/01007F200B0C0000/romfs/data.dat）。请注意，data.dat>4GB，因此如果您的SD卡使用FAT32格式化，那么根据cutepatatas，您将需要将文件FTP到DBI。
• 尽情享受！

再次感谢您@coomi和@拉科维奇对于我用作基地的裸体模组，以及Kiseki Modding Discord的杰出人士，在IT3格式的逆向工程方面寻求帮助。感谢Luigi Auriemma（https://aluigi.altervista.org/quickbms.htm）提供我用来逆向工程data.dat文件的脚本。

 

注意：没有从PC版本更改任何文件，我只是为开关打包了它们。这些显然没有经过彻底测试，因为我没有改装的开关，所以如果有人告诉我它们是否正常工作，我将不胜感激。编辑：已确认工作，请参阅下一篇文章。

Sorry, I'm having trouble. This happened after I followed the tutorial.

[amorrow28]

3 hours ago, 大人物 said:

Sorry, I'm having trouble. This happened after I followed the tutorial.

I tested with the English language release, it is possible there are strange filenames with the Asian language release. However, I think the more likely problem is data file corruption. First, I would try to use your unmodifed data.dat file in romfs and see if it crashes the game. Also, try to extract the file with quickbms.

[大人物]

49 minutes ago, amorrow28 said:

I tested with the English language release, it is possible there are strange filenames with the Asian language release. However, I think the more likely problem is data file corruption. First, I would try to use your unmodifed data.dat file in romfs and see if it crashes the game. Also, try to extract the file with quickbms.

It's strange, I'm having the same problem with YS9, but my friend was able to use your tutorial successfully.I'll try QuickBMS.

In a few days, KYOTO XANADU -the Blooming Phantom- will be released. Will you modify this game?

[amorrow28]

28 minutes ago, 大人物 said:

It's strange, I'm having the same problem with YS9, but my friend was able to use your tutorial successfully.I'll try QuickBMS.

In a few days, KYOTO XANADU -the Blooming Phantom- will be released. Will you modify this game?

I must wait for the English language release. 😅

Edited July 12 by amorrow28