I am trying to change the height of the glass, so in order to do this it's telling me to add a railing, change size of glass then delete railing. I only have the three options, general-roof-materials.
I am building a shower wall using X16 and only have three options for the shower glass. I am following a tutorial for building it and the tutorial shows a list of sub categories while mine only shows 3. Do I have to upgrade to open these options?