I dumped the data for two recent Switch games, the visual novels Illusion of Itehari and Mistonia's Hope -The Lost Delight- and noticed the file structure is Unity.

I was able to extract the music files using AssetStudio but I'm unable to preview any of the textures (background images or sprites) using AssetStudio.

I tried using AssetRipper to extract the background image and sprite files but the results are pngs that look scrambled.

I ran into this issue with visual novels using a different (proprietary?) engine and was able to "descramble" them using a Noesis script but I'm at a loss for how to process the Unity image files.

Here are some of the game files:

CGs https://pixeldrain.com/u/jA4WKXQD

Character 01 Sprites https://pixeldrain.com/u/uD8xg9ca

 

Here's an example of the images I'm currently receiving when exporting from AssetRipper:

 

 

Edited January 7Jan 7 by Riesz

On 1/7/2026 at 7:37 PM, Riesz said:

I dumped the data for two recent Switch games, the visual novels Illusion of Itehari and Mistonia's Hope -The Lost Delight- and noticed the file structure is Unity.

I was able to extract the music files using AssetStudio but I'm unable to preview any of the textures (background images or sprites) using AssetStudio.

I tried using AssetRipper to extract the background image and sprite files but the results are pngs that look scrambled.

I ran into this issue with visual novels using a different (proprietary?) engine and was able to "descramble" them using a Noesis script but I'm at a loss for how to process the Unity image files.

Here are some of the game files:

CGs https://pixeldrain.com/u/jA4WKXQD

Character 01 Sprites https://pixeldrain.com/u/uD8xg9ca

 

Here's an example of the images I'm currently receiving when exporting from AssetRipper:

 

 

 

 

ASTC 4X4 SWITCH SWIZLE 4,16

Edited January 8Jan 8 by Rabatini

@Riesz

I developed a tool for a friend in the past, originally designed for a Switch game that uses Unity assets.
I’ve now adapted it to work with your game. Hope you enjoy it!

Note: Sprites haven’t been implemented yet—maybe in the future.
But developing for new console video games isn’t really my thing. 😛

need NET 8.0 to run.

Open your file directly in the tool.

Illusion of Itehari Viewer.zip

Edited January 9Jan 9 by Rabatini

Amazing!! Thank you so much!