One can place 2 trees, one with transparency 0 and another with transparency 1.

I've just purchased some trees from your website.

I have the same problem as the others before. The trees behave weird in 3D view.

I've read the FAQ already. I'm using REVIT 2016.

If I set the transparency they behave well, but how can I make them cast shadow if I have to keep the transparency value different from 0?

I've never had this problem with my other families.

What is your solution? I cannot use Revit 2013.