Publishing 3D images for BIMx

[SS]

When working in ArchiCAD, I like my 3D images to have a level of transparency.  This requires the surface materials involved to have some transparency in their settings.  However, in BIMx, I prefer the 3D model to be opaque, so I save an opaque 3D view just for that purpose.  Unfortunately, when I open the 3D model in BIMx, it always has a level of

transparency, which is harder to see.  How do I ensure that the 3D model in BIMx is opaque?