Mac：/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.css
Windows：\Microsoft VS Code\resources\app\out\vs\workbench\workbench.desktop.main.css
Linux：/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.css
修改完成后会提示vscode已损坏，点击不再提示即可。
body {
background-image: url(https://upload-images.jianshu.io/upload_images/15066031-c0ce8aa1e3f45297.jpg);
background-size: cover;
background-repeat: no-repeat;
background-position: center;
opacity: 0.81;
}
SharedScreenshot.jpg
附上 background：
backgroundPicture.jpg
