I second this. I used Cosmographer deckplans for vault-like maps to recreate Gamma World maps.

You could perhaps also use SS3 Modern Blueprints to make maps like this:

If I could make a suggestion, I'd love to see a sci-fi/deckplan style for Perspectives 3.

Like many others I got into map making when I started playing D&D. For me it was during the transition from 2E AD&D to 3E D&D in the late 90s/early 00s. I remember getting my hands on the CC2 demo and playing around with it. Back then my maps were hand drawn but as I got older I learned how to use programs such as Photoshop and Gimp. It wasn't until fairly recently, during the pandemic, that I started to play online and needed maps for Roll20 and rediscovered Campaign Cartographer.

A long time ago I made a map of the classic D&D B/X module Isle of Dread and had it printed on A1 or A0 format (don't remember exactly). This was before I started using CC3 and was made with Photoshop.

The adventure module only showed the coast, leaving it up to players to explore and fill in the interior of the island. I think I still have the map somewhere in storage.

It was a fresh download, I had just purchased the Humble Bundle. I was on Linux, but switched over to a Windows machine and there it unzipped normally. Strange, usually it's the other way around for me. Issue is resolved now. :D

Fixed some minor mistakes and spelling errors.