To extract texture files out of Minecraft Java Edition, do the following:

1. Navigate to the folder where Minecraft is stored. The default locations are as follows:
   macOS: ~/Library/Application Support/minecraft
   Windows: %APPDATA%\.minecraft Linux: ~/.minecraft
2. Open the versions folder/
3. Find the version you want and open the folder*
4. Unzip the version JAR that you want to extract textures from.
   Recommended methods:
   • macOS:
     1. Right-click the version .jar file.
     2. Choose Open With -> Archive Utility
     3. Open the created folder and navigate to assets/minecraft/textures
   • Windows
     1. Duplicate the version .jar files
     2. Change the file extension of the duplicated jar to .zip
     3. Double-click to open the zip file
     4. Navigate to assets\minecraft\textures
   • Linux
     1. Execute in terminal: unzip [version].jar
     2. Navigate to assets/minecraft/textures

*If you could not find the version you want, you will have to download it using the Minecraft launcher