I have been fiddling with translucency for quite some time but with no success.
Could you please enlighten us how you created this semi-transparent glass?

I have imported your object into blender, discovered that the material is set to Z transparency but the values set make no sense to me. I have also played with semi transparent textures but to no avail, objects appear in SH3D either solid or transparent. Too bad PS Elements won't let me add an alpha channel.

I have made my own windows, that is not the problem. I want to create semi-transparent, translucent vertical blinds.