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KeyShot 11

Keyshot Export Guidelines

Before we import our mesh into Keyshot, we need to consider a few things. Keyshot does a great job of hiding some mesh errors. In some cases, the magic Keyshot performs to your mesh isn’t carried over to the export. So we need to ensure to follow this checklist before we import our models.

Mesh Prep Checklist

  • Ensure all mesh components have a UV channel
    • Keyshot has UV editing tools but can not create information that isn’t there; Keyshot can not create UV information
  • Ensure mesh normals are pointing in the correct direction
    • This helps avoid potential Transparency issues
  • Ensure verts are properly welded
    • This helps us avoid potential render artifacts and shading errors.
  • Merge mesh components when available
    • This helps create a more user-friendly scene as well as reduces the number of bake operations Keyshot has to perform. This will also decrease export time.
  • Avoid Displacement maps
    • These do not export, it is recommended that a normal map be used instead.
  • Unite size: MM
    • This drastically affects the export time.

Scene Considerations

Scene unit size is the most important setting when it comes to export time. This is because Keyshot exports its textures to scale.

If you have an asset that is three meters long, you will export with textures around three meters in size. This can cause various issues with the exporter; we recommend changing the scene unit size to MM to avoid these. This ensures a quick high, fidelity export.

Materials
We recommend using the advanced material in Keyshot as it exports more consistently.

A thing to keep in mind is that Keyshot uses the specular channel as the primary channel in its material’s overall specularity. On export, however, it uses the information in the roughness channel. We need to ensure that we have the correct information in our roughness channel to export our material correctly. Luckily roughness is just inverted specular information. All that we need to do is take our specular information and invert it. This is really easy to do if you are using a texture or a value for Specularity.

This is why we recommend the advanced material, it exposes the specular channel as well as giving us a roughness input to channel the corrected information into.

Other specialized materials such as Plastic, Paint…etc are not recommended and only for advanced use cases.
This is because they do not expose the specular values of the material. This is done to help guide the specular levels to fall in line with the materials type (Plastic, Paint…etc). So your exports may very but a good rule of thumb is to avoid using extremely specular values ex . 005, .05 as these will export too shiny.

Setting up a material using a Specular Texture.

Material Graph before Color Invert node

Material Graph after Color Invert node

If this is the case, we can simply take our specular texture and run it through a Color Invert node and run that into our roughness.

Setting up a material using a Value.
If we do not have a texture, we can take the value in the specular field and use that to create a color. For example, if we have a value of .5 for our specular, we should make a Color Gradient node and change the color of both color properties to a 50% grey color.


Setting both colors to the same color effectively changes our gradient into a color constant after we have set the color, we can connect that to our specular channel. Then we can invert it and plug the inverted color into our roughness.

Material Graph before Color Gradient node

Material Graph after Color Gradient node

This can be found by right-clicking in your Material Graph → Textures → Color Gradient

Transparency
Using .LMT files or specialized materials can lead to opacity issues when exporting. If you are experiencing these issues and are forced to use the .LMT it is best to apply a color gradient with a value of one or white set for both color inputs to ensure the material is opaque. This will ensure the materials opacity is set to opaque.

Exporting
After we have made our material edits, we can export it as a GLB.
To export, we go to File → Export → Export to GLB

 

We have found that exporting at 300 dpi is a good middle ground between quality and export time; if you notice blurry textures, you may need to increase the DPI or take a look at your asset’s UVs.

If you are looking for the best quality export, we recommend adding AO with samples set to 75

(note that exporting with AO will significantly increase export times)

Hardware Recommendations
Keyshot uses the CPU as the primary component for most render and baking operations. You can set the renderer to utilize the GPU for rendering tasks but all export processes will be run on the CPU.

In order to increase export/render times it is recommended you use a CPU with a high Core count. The more cores available the more calculations can be performed thus decreasing the time it takes for an asset to export/render.

RAM is another key component when exporting from Keyshot, at the very minimum 64GB of ram. RAM is important as it allows Keyshot to store information pertaining to its bake operations the more RAM on hand the quicker it can perform its baking tasks.

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