Undertale/Deltarune NSFW mods?

[Sunshine Recorder]

34 minutes ago, losstie27 said:

 

What's your process? I've been editing the entire sprite sheets from The Spriters Resource and then uploading those into UTMT as embedded textures, then manually searching for the sprites I need to update in the program and updating their sprite positions to match my custom spritesheets. I know there's other ways to do it, so I'm curious if your way is any easier, because mine is sort of tedious.

 

Basically I open up UTMT and go to Sprites. Then I click on a sprite like spr_susied_dark or spr_ralsei_hug and export all of the frames (PageItems) associated with that sprite. Then I go to GIMP and edit the pngs so that they're nude. Then I go back to UTMT, and import each edited frame by going to each PageItem's respective page and clicking Import. Although this will permanently remove the original sprite from the data.win file. In other words, I'm just replacing the sprites that are already in the game's embedded textures with new ones.

 

Screenshots

Spoiler

 

 

 

Edited July 4, 2025 by Sunshine Recorder

[Manguers]

@losstie27 It's not really a comic, it's just a page:

 

Beside, I was also inspired by the Rookierune mod

[Buddussy]

On 6/30/2025 at 1:27 AM, Sunshine Recorder said:

Here's some amateur nude sprite edits I did of Noelle (I only edited sprites of Noelle from Deltarune Chapter 1), I tried to make my nude Noelle sprites almost as similar to her in-game design as I possibly could, and I also wanted her color palette to stay the same in her nude design. I also made two versions of these sprites. One with Noelle having brown belly fur, and one with Noelle having white belly fur.

 

spr_noelle_d

 

(Brown Fur)

 

(White Fur)

 

 

spr_noelle_dt

 

(Brown Fur)

 

 

(White Fur)

 

 

spr_noelle_r

 

(Brown Fur)

 

 

(White Fur)

 

 

spr_noelle_rt

 

(Brown Fur)

 

 

(White Fur)

 

 

spr_noelle_l

 

(Brown Fur)

 

 

(White Fur)

 

 

spr_noelle_lt

 

(Brown Fur)

 

 

(White Fur)

 

 

spr_noelle_ut

 

 

spr_noelle_ut_r

 

 

spr_noelle_ut_l

 

 

 

(Screenshots of Sprites)

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I like both of these, they're great! Though I have to say that the white fur variant gives off a tan line effect that's really hot and works really well.

 

21 hours ago, Sunshine Recorder said:

 

Yes, I'm modding these sprites into the game myself.

 

 

 

 

Thanks, but I prefer my design of Susie since her figure is based off of these real Susie sprites from Deltarune Chapter 3.

 

 

 

 

 

Edit: Oh also here are some Dark World sprites of Susie walking down. Her body and legs might need more shading though. (Apparently the sprites of spr_susied_dark are one pixel smaller than the sprites of spr_susied)

 

spr_susied_dark

 

(Screenshot)

 

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I think a baggy clothes, skinny body situation works well for Susie, she's not exactly well fed, you could even put little rib lines on her stomach.

Edited July 5, 2025 by Buddussy

[Buddussy]

On 7/4/2025 at 10:11 AM, Sunshine Recorder said:

Here's some more amateur nude sprite edits I did of Noelle (This time I edited the Light World sprites of Noelle from Deltarune Chapter 2). spr_cutscene_28b_noelle_side_edit_b is not included.

 

 

spr_noelle_walk_down_lw

     

 

spr_noelle_walk_up_lw

 

spr_noelle_walk_left_lw

     

 

spr_noelle_walk_right_lw

     

 

spr_cutscene_28b_noelle_walk_books_down

     

 

spr_cutscene_28b_noelle_walk_books_up

 

spr_cutscene_28b_noelle_walk_books_left

     

 

spr_cutscene_28b_noelle_walk_books_right

     

 

spr_cutscene_28b_noelle_side_edit_a

     

 

spr_cutscene_28b_noelle_head_tilt

 

spr_noelle_shocked_lw

     

 

spr_noelle_game

     

 

spr_noelle_game_right

     

 

spr_noelle_game_unhappy

     

 

spr_noelle_game_done          (These were very difficult to edit)

     

 

spr_cutscene_02b_noelle_raise_hand

 

spr_cutscene_03b_noelle_blush

 

spr_cutscene_03b_noelle_face_left

 

spr_cutscene_28b_noelle_desk_sleep

 

spr_cutscene_28b_noelle_desk_shocked

     

 

spr_cutscene_28b_noelle_desk_down

     

 

spr_cutscene_28b_noelle_desk_left

     

 

spr_cutscene_28b_noelle_desk_wake_left

     

 

spr_cutscene_28b_noelle_desk_left_unhappy

     

 

_______________________________________________

 

 

Here are some screenshots of the sprites

 

(Brown Fur)

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(White Fur)

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And here are some in-game screenshots

 

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Cutie patootie Noelle...

[losstie27]

22 hours ago, Sunshine Recorder said:

 

Basically I open up UTMT and go to Sprites. Then I click on a sprite like spr_susied_dark or spr_ralsei_hug and export all of the frames (PageItems) associated with that sprite. Then I go to GIMP and edit the pngs so that they're nude. Then I go back to UTMT, and import each edited frame by going to each PageItem's respective page and clicking Import. Although this will permanently remove the original sprite from the data.win file. In other words, I'm just replacing the sprites that are already in the game's embedded textures with new ones.

 

Screenshots

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Oh! So you go through and do it animation by animation. I see... Ive been doing all of the sprites at once and importing them all at the end so that I can be sure I didn't miss any, but maybe I'll try it this way.

 

7 hours ago, Manguers said:

@losstie27 It's not really a comic, it's just a page:

 

Beside, I was also inspired by the Rookierune mod

Wow, I'm shocked they even allowed that original mod on Gamebanana with how prudish they can be sometimes

[Sunshine Recorder]

On 7/4/2025 at 7:38 PM, Sunshine Recorder said:

 

I decided to take a crack at making nude sprites for Susie and I managed to make some quick nude sprites of Light World Susie walking down (that are close to her in-game art style and color palette). I'm not entirely sure if this design will translate well with the other sprites that display her walking left, right, and up, but I'll try to edit those sprites in the future.

 

spr_susied --- (Deltarune Chapter 1) (Outdated)

 

 

Screenshot (Outdated)

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Alright, so I managed to do the rest of Susie's basic walking sprites, and also updated the sprites where she's walking down. I do think that some of her Dark World sprites need more shading though. (All of these sprites are from Deltarune Chapter 1)

 

 

spr_susied

 

spr_susied_dark

 

spr_susieu

 

spr_susieu_dark

 

spr_susiel

 

spr_susiel_dark

 

spr_susier

 

spr_susier_dark

 

 

 

(Screenshots)

Spoiler

 

 

("spr_susier" without arms)

 

 

Edited July 8, 2025 by Sunshine Recorder

[Sunshine Recorder]

Here's some nude sprites I did of Catty from Deltarune.

 

_____________________________________

 

spr_npc_catty

 

spr_npc_catty_wave

 

spr_npc_catty_ukelele

 

spr_catty_omg

 

 

spr_catty_back

 

spr_npc_catty_milk

 

 

____________________

 

(Screenshot)

Spoiler

 

(In-game Screenshot)

Spoiler

 

Edited July 11, 2025 by Sunshine Recorder

[Imaynotbehere4long]

On 7/4/2025 at 5:53 PM, Sunshine Recorder said:

On 7/4/2025 at 5:31 PM, losstie27 said:

What's your process? I've been editing the entire sprite sheets from The Spriters Resource and then uploading those into UTMT as embedded textures, then manually searching for the sprites I need to update in the program and updating their sprite positions to match my custom spritesheets. I know there's other ways to do it, so I'm curious if your way is any easier, because mine is sort of tedious.

 

Basically I open up UTMT and go to Sprites. Then I click on a sprite like spr_susied_dark or spr_ralsei_hug and export all of the frames (PageItems) associated with that sprite. Then I go to GIMP and edit the pngs so that they're nude. Then I go back to UTMT, and import each edited frame by going to each PageItem's respective page and clicking Import. Although this will permanently remove the original sprite from the data.win file. In other words, I'm just replacing the sprites that are already in the game's embedded textures with new ones.

 

As someone who's made Game Maker mods before, I can tell you there's an even easier way than that: at the top of UndertaleModTool, click Scripts > Resource Exporters > Export All Sprites, then when it asks if you want them unpadded, click no. Then, you can go to the export folder and browse by looking at the actual images themselves via Windows Explorer previews. After you're done editing, click Scripts > Resource Importers > Import Graphics, and select the folder your edited sprites are in (you can put them in a different folder for convenience if you want), and they'll all be replaced automatically since they'll all have the same filenames as their internal sprites already. None of that tedious individual selection you two stumbled across.

 

P.S. While you're at it, you might also want to click Scripts > Resource Exporters > Export All Textures as well since that will export Backgrounds (in case you don't see what you're looking for in the exported Sprites folder). Just don't use that one's Sprites folder because they're automatically unpadded, which can mess up their alignments on import. Also, when importing Background sprites, the edited graphics do need to be in a folder called "Backgrounds" or they'll be imported as sprites and not replace their originals.

[NEOMrRandomMan]

On 7/10/2025 at 6:53 AM, Sunshine Recorder said:

Here's some nude sprites I did of Catty from Deltarune.

 

_____________________________________

 

spr_npc_catty

 

spr_npc_catty_wave

 

spr_npc_catty_ukelele

 

spr_catty_omg

 

 

spr_catty_back

 

spr_npc_catty_milk

 

 

____________________

 

(Screenshot)

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(In-game Screenshot)

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Damn you’re really carrying this thread lmao.

[losstie27]

Hey everyone, still slowly getting stuff done. I've been super busy with life stuff, plus I'm having to work past the mental hurdle of most of the easy characters being done already. Working on Asgore and Toriel especially has been a pain with their giant robes.
Here's my progress on the King so far:

I've definitely been saved by his more form-fitting outfit in Deltarune (a luxury I do not have with Toriel). Let me know what you think.

On the complete other end of masculinity, I've gone ahead and done the sprites I needed for Mettaton EX. You may notice he doesn't have a dick. That is because it didn't look right. My explanation is that, being as gender-nonconforming as he is, he has a panel on his crotch to switch parts whenever he likes.

In case you were you were curious, I am also getting rid of all of normal Mettaton's suits and outfits during his TV segments. I don't really feel the need to show to that because, I mean, it's just Mettaton. I think I'll change the Dress Lion character to get makeup or something instead. I don't know.

 

Finally, I also fixed So Sorry, but I don't think anyone cares about that.

 

  

On 7/9/2025 at 4:53 PM, Sunshine Recorder said:

Here's some nude sprites I did of Catty from Deltarune.

 

_____________________________________

 

spr_npc_catty

 

spr_npc_catty_wave

 

spr_npc_catty_ukelele

 

spr_catty_omg

 

 

spr_catty_back

 

spr_npc_catty_milk

 

 

____________________

 

(Screenshot)

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(In-game Screenshot)

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Very nice! I'm shocked with unpopular it seems Catty is here. I always thought she was hot.

 

9 hours ago, Imaynotbehere4long said:

 

As someone who's made Game Maker mods before, I can tell you there's an even easier way than that: at the top of UndertaleModTool, click Scripts > Resource Exporters > Export All Sprites, then when it asks if you want them unpadded, click no. Then, you can go to the export folder and browse by looking at the actual images themselves via Windows Explorer previews. After you're done editing, click Scripts > Resource Importers > Import Graphics, and select the folder your edited sprites are in (you can put them in a different folder for convenience if you want), and they'll all be replaced automatically since they'll all have the same filenames as their internal sprites already. None of that tedious individual selection you two stumbled across.

 

P.S. While you're at it, you might also want to click Scripts > Resource Exporters > Export All Textures as well since that will export Backgrounds (in case you don't see what you're looking for in the exported Sprites folder). Just don't use that one's Sprites folder because they're automatically unpadded, which can mess up their alignments on import. Also, when importing Background sprites, the edited graphics do need to be in a folder called "Backgrounds" or they'll be imported as sprites and not replace their originals.

Thanks for the suggestion! This definitely sounds like it would make some things way easier, but it still doesn't fix my biggest problem of giving me an easy way of knowing everything I need to edit. Knowing that they don't have to be in the same folder structure though is good. I might try experimenting some to see if I can shorten the workflow.

[Sunshine Recorder]

49 minutes ago, losstie27 said:

Thanks for the suggestion! This definitely sounds like it would make some things way easier, but it still doesn't fix my biggest problem of giving me an easy way of knowing everything I need to edit. Knowing that they don't have to be in the same folder structure though is good. I might try experimenting some to see if I can shorten the workflow.

 

I'm not sure if you know about this already, but here's a spreadsheet I found that catalogs every piece of text in Undertale. It also tells you which pieces of text are accessible, not accessible, and accessible after resets, which pieces of text are only found in the neutral route, true pacifist route, genocide route, or hard mode, and which pieces of text are tests/errors and variables. It can also tell you which character says each text, and which area and room each text can be found in.

 

https://docs.google.com/spreadsheets/d/1whOyrTlY-vTsEFjkg0UFSuO8mVqy4OUV8RqKFbky8tY/edit?gid=839709064#gid=839709064

 

 

There's also this website that organizes each piece of dialog by which character says it.

 

https://hushbugger.github.io/dialogue/#

 

 

You'll probably still have to go through every piece of dialog in order to find out which dialog mentions clothing, but this will help you find out where each piece of dialog can be accessed to make testing a lot easier.

 

 

__________________________________

 

 

 

Also here's some amateur nude sprites I did of Susie from that video game in Deltarune Chapter 3, I do feel like these could be improved though.

 

 

spr_board_susie_hurt

 

spr_board_susie_itemget

 

spr_board_susie_dig

 

spr_board_susie_sleep

 

spr_board_susie_walk_down

 

spr_board_susie_walk_down_armsup

 

spr_board_susie_walk_left

 

spr_board_susie_walk_left_armsup

 

spr_board_susie_walk_right

 

spr_board_susie_walk_right_armsup

 

spr_board_susie_walk_up

 

spr_board_susie_walk_up_armsup

 

(Screenshot)

Spoiler

 

 

[losstie27]

1 hour ago, Sunshine Recorder said:

 

I'm not sure if you know about this already, but here's a spreadsheet I found that catalogs every piece of text in Undertale. It also tells you which pieces of text are accessible, not accessible, and accessible after resets, which pieces of text are only found in the neutral route, true pacifist route, genocide route, or hard mode, and which pieces of text are tests/errors and variables. It can also tell you which character says each text, and which area and room each text can be found in.

 

https://docs.google.com/spreadsheets/d/1whOyrTlY-vTsEFjkg0UFSuO8mVqy4OUV8RqKFbky8tY/edit?gid=839709064#gid=839709064

 

 

There's also this website that organizes each piece of dialog by which character says it.

 

https://hushbugger.github.io/dialogue/#

 

 

You'll probably still have to go through every piece of dialog in order to find out which dialog mentions clothing, but this will help you find out where each piece of dialog can be accessed to make testing a lot easier.

 

 

__________________________________

 

 

 

Also here's some amateur nude sprites I did of Susie from that video game in Deltarune Chapter 3, I do feel like these could be improved though.

 

 

spr_board_susie_hurt

 

spr_board_susie_itemget

 

spr_board_susie_dig

 

spr_board_susie_sleep

 

spr_board_susie_walk_down

 

spr_board_susie_walk_down_armsup

 

spr_board_susie_walk_left

 

spr_board_susie_walk_left_armsup

 

spr_board_susie_walk_right

 

spr_board_susie_walk_right_armsup

 

spr_board_susie_walk_up

 

spr_board_susie_walk_up_armsup

 

(Screenshot)

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This is a really funny thing to lewd, but I enjoy it. I think some sprites, like the ones where she has her arms arm, would benefit from a red pixel to represent the pussy. You could also try that with the nipples, but those may look too cluttered. 

 

I've seen the second link that sorts it by character, but I hadn't seen that spreadsheet. Ive been putting off dialogue modding in case anyone else who was better at writing would want to give it a go. Speaking of, sort of, is there any chance you could try Muffet's overworld sprites, I've been struggling a ton, so maybe a fresh pair of eyes could do it.

[Sunshine Recorder]

 

2 hours ago, losstie27 said:

 

This is a really funny thing to lewd, but I enjoy it. I think some sprites, like the ones where she has her arms arm, would benefit from a red pixel to represent the pussy. You could also try that with the nipples, but those may look too cluttered. 

 

I've seen the second link that sorts it by character, but I hadn't seen that spreadsheet. Ive been putting off dialogue modding in case anyone else who was better at writing would want to give it a go. Speaking of, sort of, is there any chance you could try Muffet's overworld sprites, I've been struggling a ton, so maybe a fresh pair of eyes could do it.

 

Here are some nude edits of Muffet's overworld sprites.

 

Since she had a slender form, I decided to make her skinny and flat-chested.

 

I made two different versions of these sprites, with one consisting of a completely skinny Muffet, and one consisting of a skinny Muffet with a slightly bigger butt.

 

________________________________

 

spr_muffet_overworld

 

 

spr_muffet_buysell

 

 

 

________________________________

 

(Screenshot)

Spoiler

 

Edited July 11, 2025 by Sunshine Recorder

[losstie27]

25 minutes ago, Sunshine Recorder said:

 

 

Here are some nude edits of Muffet's overworld sprites.

 

Since she had a slender form, I decided to make her skinny and flat-chested.

 

I made two different versions of these sprites, with one consisting of a completely skinny Muffet, and one consisting of a skinny Muffet with a slightly bigger butt.

 

________________________________

 

spr_muffet_overworld

 

 

spr_muffet_buysell

 

 

 

________________________________

 

(Screenshot)

  Reveal hidden contents

 

 

Thanks! I think the bigger butt versions work better both with her battle sprite, and just her being a spider with an abdomen. You don't care if I use these as is, do you?

[Sunshine Recorder]

2 minutes ago, losstie27 said:

 

Thanks! I think the bigger butt versions work better both with her battle sprite, and just her being a spider with an abdomen. You don't care if I use these as is, do you?

 

I don't mind if you use them

[losstie27]

44 minutes ago, Sunshine Recorder said:

 

I don't mind if you use them

 

I greatly appreciate it. I'd been struggling with Muffet for a while, just because of how small her sprite is. I edited it slightly, as to make it match a little better with how I'd done other similar bodies, but not by much. I also tried that method Imaynotbehere4long recommended, and I think it saved a good bit of time. Still a little tedious, but I think I found a good balance. So thank you all.

[Sunshine Recorder]

Here's some amateur nude sprites I did of Cat Mom and Cat Dad from Deltarune.

 

____________________________

 

spr_npc_cattydad

 

spr_npc_cattydad_wave

 

spr_catti_dad_diner

 

spr_catty_dad_choir

 

spr_catty_dad_church

 

spr_catty_dad_church_thumbs_up

 

spr_catty_dad_cringe

 

spr_npc_catti_dad_tree

 

spr_npc_catti_mom_no1_full

 

spr_npc_catti_mom_no1

 

spr_catty_mom_back

 

spr_catty_mom_back_no1

 

spr_catti_mom_no1_tree

 

____________________________

 

(Screenshot)

Spoiler

 

 

Edited July 13, 2025 by Sunshine Recorder

[Imaynotbehere4long]

Not sure if this got changed since it was last posted, but the look of Frisk's side-view genitals really bothered me, so I tried my hand at polishing those sprites:

[EnchiladaDeQueso]

On 4/23/2025 at 7:42 PM, losstie27 said:

 

I do not remotely have the time nor willpower to take on fully respriting even one character, but here are some concepts I made for what a nude Ralsei could look like. I'm not willing to let go of this idea, I love it so much. That said, I'd be more than willing to help anyone who takes on the task, like with NPC characters and such.

I've really jerk off to this sprite man, thank you!, i love this.

[EnchiladaDeQueso]

On 6/21/2025 at 4:06 PM, losstie27 said:

The first four images were all drawn by Slugguts. I'm in their discord, and as far as I'm aware they don't have much that I haven't posted here. If you find some stuff please share though. Or even the sprites that you end up making.

Do you have the discord link server?, I need to join it

[Sunshine Recorder]

Here's some amateur nude sprites I did of Temmie, Snowy, and MK. Since MK's gender is ambiguous in both Undertale and Deltarune, I decided to make both male nude sprites and female nude sprites of them. I also decided to make them keep their cross necklace in their nude designs, although I wasn't sure what color to make the necklace, so I just decided to make it white. I'm also not experienced at making pixel art of penises, so I drew four different nude male variations of sprite "spr_mkid_side". I also wasn't sure how I should design Snowy's dick, since there's barely any Rule 34/NSFW art of male Snowdrakes, so I decided to give him light blue balls with a pink shaft. Feedback would be greatly appreciated.

 

-----------------------------------

|             (.pngs)

-----------------------------------

 

(Temmie)

Spoiler

spr_tem_eggput

 

spr_tem_sit_l

 

spr_tem_sit_r

 

spr_tem_sit

 

 

(MK)

Spoiler

spr_mkid_dt

     

 

spr_mkid_dt_shock

     

 

spr_mkid_ut

 

spr_mkid_side

     

 

spr_mkid_sweatdrop

     

 

spr_mkid_ut_l

 

spr_mkid_ut_r

 

spr_mkid_ut_r_unhappy

 

 

(Snowy)

Spoiler

spr_snowy_dt

 

spr_snowy_dt_shock

 

spr_snowy_ut (Chapter 1)

 

spr_snow_ut

 

spr_snowy_sweatdrop

 

spr_snowy_ut_l

 

spr_snowy_ut_r

 

 

(MK & Snowy)

Spoiler

spr_mkid_snowy_juice_talk_left

          

 

spr_mkid_snowy_juice_talk_right

          

 

 

 

--------------------------------------------

|             (Screenshots)

--------------------------------------------

 

 (Temmie)

Spoiler

 

(MK)

Spoiler

 

 

(Snowy)

Spoiler

 

(MK & Snowy)

Spoiler

 

 

----------------------------------

 

I also found this pixel animation of Tao from Deltarune Chapter 4 made by thatguynamedjoe on Twitter.

 

(https://xcancel.com/ThatGuyNamedJ0e/status/1945588840527257624)

 

 

Edited July 18, 2025 by Sunshine Recorder

[Sunshine Recorder]

Here's some more amateur nude Noelle sprites I did from Deltarune Chapter 2

 

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spr_noelle_walk_down_dw

     

 

spr_cutscene_13_noelle_box_wear

 

 

spr_cutscene_23b_noelle_kneel_peak

 

 

spr_cutscene_23b_noelle_kneel_laugh

 

spr_cutscene_23b_noelle_kneel_face_down

 

spr_cutscene_23b_noelle_kneel_lowered

 

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(Screenshots)

Spoiler

 

 

 

(In-game Screenshot)

Spoiler

 

 

Edited July 26, 2025 by Sunshine Recorder

[BlasterManiel03]

Heya, just stopping by to say I'm really liking how this project's coming along! One thing I would like to suggest though is for players to have the option to choose whether Frisk has male or female genitals at some point before the game starts (and maybe have the same go for Kris?)

Btw, made a lil nude Chara sprite if anyone wants it. Sorry if the palette is off or anything, I kinda did it from scratch.


 

[Sunshine Recorder]

Here's some more amateur nude sprites of Noelle, this time I tried to do some of her battle sprites.

 

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spr_noelleb_idle

 

spr_noelleb_idle_sideb

 

spr_noelleb_item_ready

 

spr_noelleb_pray

 

spr_noelleb_defend_sideb

 

spr_cutscene_26_queen_giga_bonds

 

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(Screenshots)

Spoiler

 

 

 

(In-game Screenshots)

Spoiler

 

  

Edited July 31, 2025 by Sunshine Recorder

[jotaro-]

hey guys does anyone know a thing about Sextale?
cuz i cannot access patreon 
and the mod was trashed in gamebanana