3-4 years ago I started this project with a friend in a survival map with just shovels and digging a big hole in the ground. The first thing ever made on this project was the carpet for the main lobby. My intentions for this design was to make the largest scale possible and most accurate work of the interior of the castle. I ran Minecraft alongside an emulator to get the size and scale perfect (tiles of the lobby are 4x4, stairs are exactly 1 block.) All of this was before I had heard of MCEdit and by the time I used it for clearing huge chunks of land, I was the only one working on it as my friend no longer played Minecraft. After removing the rest of the attached natural land and exporting the build to a schematic, I moved the design to a blank canvas.

From the main lobby I expanded to the first 4 level's rooms and used Spritecraft to make the huge paintings. After connecting the basement hallway to the lobby and making the stairs down to the first key door, work had come to a halt.

For the next 2-2.5 years I played on a survival economy server with little to no work on the castle. I would tell some people about the castle and show them pictures and it even got to the point where the owner carved out a giant hole in the world and let me rebuild what work I had done in single player. I had left the server and so the world it was in was reset so I resumed work on the basement on my single player world. After finishing the basement I once again stopped work on the project.

At the time I had only wanted to do inside design of the castle and nothing more, but I had found a way to export models directly from an emulator and was able to build the outside of the castle. Since I've restarted work on the build I have decided I want to do the entire game. Over the past 1-2 months I have been doing the outside of the castle and beyond the 2nd key door.

Lobby - done
Bob-omb Battlefield room - done
Thwomp's Fortress room - done
Jolly Roger Bay room - done
Cool, Cool Mountain room - done
Hallway to Courtyard/Basement - done
Secret Slide room - done
1st Bowser hall - done
Outside front - done
Outside courtyard - done
Basement - done
Hazy Maze Cave room - done
2 pillar to drain moat room - done
Dire, Dire Docks hallway - done
Spiral stairs to 2nd floor - done
2nd floor - done
Tiny, Huge Island room - done
Mirror room - done
Clock room - done
Stairs to 3rd Bowser - done

1 Bob-omb Battlefield - done
2 Whomp's Fortress (with tower) - in progress
3 Jolly Roger Bay
a Inside the ship
4 Cool, Cool Mountain
a Penguin slide
5 Big Boo's Haunt
6 Hazy Maze Cave
7 Lethal Lava Land
a Inside volcano
8 Shifting Sand Land
a Inside Pyramid
9 Dire, Dire Docks
10 Snowman's Land
a Inside Igloo
11 Wet-Dry World
12 Tall, Tall Mountain
a Secret Slide
13 Tiny-Huge Island
a Inside Mountain
14 Tick Tock Clock
15 Rainbow Ride

Princess Secret Slide
Secret Fish Tank
Wing Cap
1st Bowser
1st Bowser Arena
Invisible Cap
Metal Cap
2nd Bowser
2nd Bowser Arena
Mario over the rainbow
3rd Bowser
3rd Bowser Arena