I use Directory Opus, and it has the functionality to detect what file type you are viewing and display an image accordingly. The images I have been using are a collection from the Windows Vista era. They are called Vista Corner. I would really like to update them.
Directory Opus uses the term "Backdrops", but they are essentially an icon, but in PNG format.
In the image below, Direcory Opus has detected I am viewing an image file type folder, and it is displaying L Profile Pictures.png in the bottom right corner of the screen. As you can see, the sizes vary around about 200px x 200px +.
I would need eight different file types.
These are the image files Directory Opus is currently using for the various file types. Image files are attached below.
Archives > L Folder Zip.png
Documents > L Profile Documents.png
Images > L Profile Pictures.png
Music > L Profile Music.png
Programs > L Installer.png
System > L File System.png
Text > L File Text.png
Videos > L Profile Videos.png
If someone has some to offer, I would really appreciate it.