In xaml, <Viewbox> as a container for <Viewport3DX ...> causes scenes to be blurry.

When using a Windows.UI.Xaml.Controls.Viewbox as a parent container for a hx:Viewport3DX the hx:Element3DPresenter's Content is blurry.

In the original code from Examples/FileLoadDemo project, a Grid is used as the parent container and the image remains sharp. Below is a small edit version from the Examples/FileLoadDemo project.

<Viewbox>

<hx:Viewport3DX

    EffectsManager="{Binding EffectsManager}"

    ... >

   <hx:Element3DPresenter Content="{Binding GroupModel}" />

 </hx:Viewport3DX>

</Viewbox>

Is there a property that needs to be set to keep the image sharp while using a Viewbox?

Thank you.