3D-Model Balcony door and window

When importing to sweet, writes that the file format is not supported.

My windows are not transparent for some reason

It means that your render differs from the rendering in which the materials of this model were configured

I do not know what rendering is, can I fix it somehow?

Remove the glass) if you do the interior - then you do not need glasses

To remove it is necessary in any 3d the editor? Or in the sweetest you can delete?

I have never worked with sweet, but it can be done without any problems in 3d max.

But I did not work in max)) I realized that I had to rescue another model)

The window model is not a problem) there are a lot of them and here on the site and generally on the web

Thank you! Very useful!