I'm thinking you might have to build it as either a different stair type or separate stair objects for the different materials (yes, that does sound...
Never really looked into that before, so that is on my list of things to figure out, so far have not managed to get a custom Revit parameter into the...
I used to have one of the old Mass Family Templates lying around, where you have the 'classic' form tools in the Mass category. Don't think I have it...
That is the ribbon from the Conventional Family Editor. Which exists if a family was started as a Generic Model, and then switched to a Mass Family....
I tried that, but so far all I get is an extra parameter in the IFC with the data and the OOTB one not having any data in it. Will have to look at it...
