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MZ To apply a plugin to Altsavescreen that plugin displays thumbnails on the save screen using Data URL

BMM_Archive · July 15, 2026

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Preserved forum archive. This topic stores the original first post and locally mirrored RPG Maker Web attachments when available. It is posted by the BMMPlay archive account, not by the original creator.

Original Source

  • Original title: MZ To apply a plugin to Altsavescreen that plugin displays thumbnails on the save screen using Data URL
  • Original author: INSA
  • Original date: January 9, 2024
  • Source thread: https://forums.rpgmakerweb.com/threads/to-apply-a-plugin-to-altsavescreen-that-plugin-displays-thumbnails-on-the-save-screen-using-data-url.164634/
  • Source forum path: Game Development Engines > RPG Maker Javascript Plugins > Javascript/Plugin Support

Summary

Hello, I'm sorry if this is the wrong place to post this thread, but here goes. I searched for several plugins to create a game save screen like Disco elysium. - Vertical single-stage save UI with a thumbnail at the time of saving at the top and a save list at the bottom. - And this is exactly what I found. Data URL使ってセーブ画面にサムネイル表示したった【RPGツクールMZ】 - Qiita

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Archived First Post

Hello, I'm sorry if this is the wrong place to post this thread, but here goes.
I searched for several plugins to create a game save screen like Disco elysium. - Vertical single-stage save UI with a thumbnail at the time of saving at the top and a save list at the bottom. -
And this is exactly what I found.

qiita.com

Data URL使ってセーブ画面にサムネイル表示したった【RPGツクールMZ】 - Qiita

「セーブデータとセーブ画面・ロード画面の変更」プラグイン備忘録 通称「自分用セーブプラグイン」 ソースコードは以下にて公開中。 自分用なので他者環境で動作するかは不明。 サムネイル表示 2022年2月21日にサムネイル表示を追加した。 本書はその際のやったことメモ...
qiita.com qiita.com
github.com

RPGMZ-Plugin/KRD_MZ_Save.js at master · kuroudo119/RPGMZ-Plugin

RPGツクールMZ用プラグイン置き場。. Contribute to kuroudo119/RPGMZ-Plugin development by creating an account on GitHub.
github.com github.com

This is a save thumbnail screen created by Japanese plugin developer Kurodo. This is a plug-in that applies a basic plug-in.
By inserting an image converted into a Data URL into the basic list-type plugin, it outputs the image on the save itself.



As you can see, Kurodo has left a development log on his blog detailing the implementation of this plugin.
I decided to follow suit and apply it to RMMZ's built-in plugin, AltSaveScreen, which has a vertical one-column UI.
I modified AltSaveScreen's output window to flip upside down, so that the content is displayed at the top like Disco elysium. And I inserted it in that part!! The result is as follows:

1704775343227.png


At this stage, it looked like a success.

But after a while, I realized... This was a save file I had used earlier to test the original version written by Kurodo.
Naturally, his plugin's function to convert this snapshot into a URL string and output it worked well.

1704775603015.png


However, if you create a new save file with this plugin that I fixed, the snapshot is not output. I can't find the cause, whether it's a save problem, a URL conversion problem, or a problem with the output in the save window (I think it's probably not because snapshots of previous save files are output properly.). I've been stuck on this problem for almost a week, and I've tried all sorts of different implementations, but this is the only one I've come up with that comes closest to the answer.


I'll attach the js file of the mod AltSavescreen I made and a demo of it.
Since the DEMO is too large, I am attaching it as a public link to the itch.io draft.

1704798109447.png

DEMO: https://insa.itch.io/demo-save-screen
Password: 1111



P.S. And it's pretty spaghetti-ish... I feel quite embarrassed. I hope you take that into consideration.
I would appreciate it if you could compare my pluin with Altsavescreen's original version and Kurodo's amazing original version.

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