You can add your own custom images to be used as icons that you can assign to Rooms. The basic image needs to be a “png” image with square dimensions (ideally 44×44 pixels but anywhere between 44 and 500 pixels).
You can use pictures of your kids or pets, company logos, personal art, whatever you want! I bought some game asset packs (like here) with some fun animated pixel art and ended up using those, and then I used a picture of Maggie, my family’s doggie. 🐶 [The specific asset pack in the GIF below was from this creator.]
If you’re interested in created an APNG (animated PNG) file from sprites, I have enjoyed using https://ezgif.com/ and clicking the APNG tab 😉 .
Once you have added a normal icon, you can also add a “popover” image to pair with it, which appears when the popover is opened.
You can also add “dark mode” images to pair with each that will show if dark mode is enabled.
All of these images can be “animated” png images too!