-Download one of the below HD packs
-Put the folder "SB4" to "C:\Users\<user>\Documents\Dolphin Emulator\Load\Textures\".
-In Dolphin enable "Load Custom Textures" in Graphics > Advanced
-A button with the text "HD Pack Enabled" should appear when you have selected a save file on the title screen.


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HD Pack
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https://drive.google.com/drive/folders/1HmS_4_C5M3c6dVPkTNqoNFLvy5MjuqIA?usp=sharing

The normal HD Pack with the original high resolution (ranges from 1K to 2K) of the textures.


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4K AI-Upscaled Pack
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https://drive.google.com/drive/folders/1B7SK7_ZwoZc7rLq0Xkeyq2BPYc8IedOU?usp=sharing

An AI-supported upscaled pack with huge resolution for every single texture. By iZePlayz
