In the past few years, we have covered plenty of cool case mods here. This infinity mirror light box for Lian Li PC-O11D Dynamic chassis is also worth a look. This is an addressable RGB light box that makes your gaming rig more colorful. You can customize it with your own design or logo too.
You can simply screw the light box in place with the screws provided, and you are ready to go. Gorilla Gaming is selling this on eBay.