This is a guest tutorial by Nick Kloski from HoneyPoint3D.

This tutorial focuses on the popular MeshMixer application from Autodesk, and how you can upload your models from MeshMixer into Sketchfab.

There is no direct export feature from MeshMixer into Sketchfab, but don’t worry! It’s easy to upload your MeshMixer models into Sketchfab if you follow these guidelines.

MeshMixer can create two different types of models: non-colored and vertex shaded. Vertex shaded models apply color based on each point of each triangle in the model. If one "point" is red, then the triangle will radiate red from that one point, and the rest of the triangle will be non-colored. If the other points in the triangle have other colors assigned to them (blue and green) then the triangle as a whole will be a mix of the colors assigned to each of the three corners:

Meshmixer to Sketchfab Tutorial image

If you are uploading a vertex-shaded model to Sketchfab, it is really easy to do so!

Start off with your model:

Meshmixer to Sketchfab Tutorial image

Then go to FileExport and save the file in the VRML format:

Meshmixer to Sketchfab Tutorial image

Upload your .WRL file to Sketchfab and enjoy your new model!

An additional tip: Vertex shaded models can look a bit drab, since they are a pretty basic rendering technique.You can spruce up a model to something much more shiny and nice by using a few simple tools. Click on 3D settings in the lower right of your model’s viewport, and go to the Materials tab.  Set the Color to something close to the color white, and drag the slider halfway to the right. Set the Specular color to something in the realm of “white” and drag the bar to the right.  Also turn up the glossiness, like this:

Meshmixer to Sketchfab Tutorial image

And you now have a much more interesting bunny! See here:

Additionally, MeshMixer works very well with "UV wrapped textures" which are models that can have photo-realistic colors on the surface. You cannot create UV wrapped textures inside of MeshMixer itself; you are only able to modify ones created in other programs (like the output from a colored 3D scan from 123D Catch). But MeshMixer can sculpt and manipulate your models without loss of the UV wrapped texture, and those colors/photo-realistic patterns will show up in Sketchfab beautifully.

The process for doing this with a 3D scan, or other UV wrapped model is similar but with an extra step. Here is a 3D scan of a Bamboo plant:

Meshmixer to Sketchfab Tutorial image

In Meshmixer, go to FileExport and choose to export to the .OBJ format:

Meshmixer to Sketchfab Tutorial image

All UV wrapped .OBJ files consist of at least three files, sometimes more: the model in .OBJ format, one is an actual image file (texture) that gets "wrapped" around the model, and one is a material (.MTL) file that tells programs how to do the wrapping (in this case, MeshMixer created two image files):

Meshmixer to Sketchfab Tutorial image

You will need to compress (.ZIP, .RAR, .7z) all of these files into one file, and that new ZIP file is the only file you will upload to Sketchfab:

Meshmixer to Sketchfab Tutorial image

Editor: You can also drag and drop the 4 files together anywhere on the site.

Once you upload that file to Sketchfab, you are all set to go, congratulations!

Editor: Scans tend to look better in Shadeless mode, which you can set in 3D Settings → Scene

Meshmixer to Sketchfab Tutorial image

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