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Sweet Home 3D Creates Custom MMD Interiors as .x or .pmd

Posted on May 26, 2018August 28, 2018 By Senshi Sun 6 Comments on Sweet Home 3D Creates Custom MMD Interiors as .x or .pmd

A feature article by LearnMMD's Senshi Sun!What is Sweet Home 3D? How can I make interior stages for MMD? Where can I make my own stage for MikuMikuDance? How do I use Sweet Home 3D to make a stage?

Create MMD interiors using Sweet Home 3D!
Now Miku has a place of her own to relax!

 

Using Sweet Home 3D
to Create Custom MMD Interiors

Sweet Home 3D is a free architectural model making software. The designers wanted to let people create 3D models of homes without a ton of hassle. (Like MMD, but for architecture.) Sweet Home 3D comes pre-loaded with furniture, walls, doors, making customizing rooms very simple. It was initially written in French, but it now supports a dozen language options, including English, Spanish, and Japanese.

To create an MMD stage with Sweet Home 3D, you will need:

  • Sweet Home 3D, which is downloadable at this third-party link.
  • a 3D software that can support .obj and .x files (I use Blender with a .x plugin)
  • your imagination

You could also use a .pmx plugin to create stages you can animate, but I’ll only be showing the basics.

In Sweet Home 3D

When you open Sweet Home 3D, you will see a grid on the top right of your screen. This grid is your workspace. Below that is a 3D preview. If you have a floor plan image that you want to use, you can open it and trace walls on top of it, or you can freehand the design.

I’m going to freehand the design of a stage with two rooms, a living room and a kitchen/dining room.

To start, I’ll add the walls. Click on the wall icon and draw out the walls. Click to start and end the walls. The new wall will start as a corner of the old one. When you are done, press escape.

The foundation is set.

Now, click on “room”. If your room is enclosed, the program will automatically create a floor when you click inside the room. Without walls, the room function will only create floors. Double-clicking on a room using the pointer tool will open a “modify room” dialogue, where you can change wall and floor colours and textures. I’m making the living room blue and the kitchen orange and brown.

The fun part is next. By default, Sweet Home 3D organizes furniture by room in the panel to the left. Click on one, then click on the chair icon to add it. Doors and windows must be attached to the walls, but other objects can go wherever you like. Here, I have added an arch to the door, windows in both rooms, and a few key pieces of furniture.

That looks cozy!

When you are happy with the look of the room, click “export to .obj” in the “3D View tab. Choose “export all”.

In Blender

In Blender, make sure you have your scene set to metric units. This will help with sizing the model. Then, import it.

The exported file.

You may notice that your new stage is very large and very complex. Press control + J to join all the new objects into a single mesh. If there are too many meshes, join them in small groups until you have one mesh. Go into edit mode, and move the model until the origin is in a better place.

Exporting 3DSH to MMD
The stage before scaling, with Animasia Miku as a reference. (You don’t need the Miku.)
MMD and SH3D
Note this was scaled 0.15 times, but you’ll want it smaller.

The stage before and after scaling, with Animasia Miku as a reference. (You don’t need the Miku.) Note this was scaled 0.15 times, but you’ll want it smaller.

Now scale the model to 0.015 of the original scale in edit mode. This may seem like a lot, but the file is currently gigantic. If the model disappears, just zoom in. The file could be so large that it was culled when you shrunk it, meaning Blender decided it was too far away to render.

Once you’re happy with it, export it to a DirectX (.x) file and load it in MMD. You may have to modify the size some more to get the stage to the best size for your models. I had to shrink my model by 0.1 in MMD because it was too big, but my export was only .15 the size of the original Sweet Home 3D file.

Sweet Home 3D in MMD
The file is successfully imported!

Have Fun!

I only discussed the basics of using Sweet Home 3D in this article. You can do much more with it. Don’t be afraid to experiment, explore, and make mistakes. Remember to Keep the Faith and credit Sweet Home 3D if you make a model using their program.


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MMD Tutorials, Senshi Sun, Sweet Home 3D

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Comments (6) on “Sweet Home 3D Creates Custom MMD Interiors as .x or .pmd”

  1. Nirvana says:
    April 22, 2020 at 9:03 am

    hey everything is good except that my x file is extremely heavy, 300mo
    So it makes mmd glitching, what can I do?

    Reply
  2. bmj says:
    October 25, 2018 at 1:09 pm

    can I use sweet home but not blender?

    Reply
    1. KillerBeer says:
      October 25, 2018 at 10:56 pm

      Well, technically PMXE does have an .obj import functionality, so nothing stops you from trying. Why don’t *you* tell *us* if it works?

      Reply
  3. Ahmad says:
    July 22, 2018 at 5:41 am

    It says “this file is not for polygon movie maker

    Reply
    1. Senshi Sun says:
      July 22, 2018 at 7:32 am

      Which program is “it”, Ahmad? PMX? What file are you trying to load?

      Reply
  4. imposter says:
    June 15, 2018 at 8:14 am

    this is so cool man :)

    Reply

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