We've compiled a collection of tilesets in this Google Drive folder that anyone can download. These are designed to be used with a third-party map creation application called Tiled, but you can also use them with any other photo editor. 

The Tilesets include: 

• Floors
• Walls
• Roofs
• Architecture features
• Terrains
• Signs
• Shadows
• Graffiti

To download the files:

1. Open the Google Drive folder
2. On the file you want to download, click the three dots to open more menu options
3. Click Download