Good question. If you want to use the GEM file, the answer is no. This is because the GEM file can only include the geometry information.
There are possibilities (see below) but not through the GEM file. What is the use case here? From what I have seen, the constructions in Revit models are usually unreliable for energy modeling. Do you work with Revit models with correct constructions? Or do you create and assign the constructions yourself and would you like to do that in Revit/Pollination?
There can be differences between the 3. For instance, you cannot use the “Full Volume” mode to extract the geometry from an area but usually you don’t want to do that. Generally speaking, and assuming you are only concerned about geometry and using the “Extruded” method to generate them they are the same.
I should add that we have been working on an alternative workflow to use the IES VE API to generate constructions and program types during the translation. This will take some time as we need the help from the IES team to add some missing API functionalities but the POC project has been very successful. That means in the near future it should be possible to export the constructions from Revit model to IES VE directly using the Pollination Revit plugin. See this video that I originally posted here:
Hi @maxhanning, do you have any additional comments about this? This is a topic that we will work on more early next year, and your input can be helpful for finalizing the details about how we would implement it.
I think it would be beneficial to bring constructions from revit to VE via pollination using the GEM file type. I am interested in transferring revit models to the VE during early stage design to run preliminary analysis such as daylighting, overheating, energy use, and whilst I can of course create and assign constructions within the VE, it streamlines my workflow if those constructions can be assigned correctly. For this reason, I often favour GBXML transfer over GEM.
I have one quick follow-up question. Do you use the Revit default constructions or have you created your own custom constructions in Revit? Or do you assign the constructions using the Pollination library?