how to set transparency level in elevation archicad

[Anonymous]

I now turn the transparency option "on" in elevation, but the glass is totally transparent and see through, however I would like to achieve the semi-transparent effect, so any body know?

big thanks!

[naomihansen]

This seemed like a great lead, but I couldn't get it to work. When creating a surface, how do you get the 25% transparency? I see how to apply a 25% fill, but you can only choose the foreground pen, and not a background pen, which is essential to obtaining the transparency.