Hi Mostapha! Thank you for the quick reply. I did some troubleshooting. I removed the windows and hid the roof using the Level selector at the top of the model editor after checking all previously stated level locations and using the auto top-ground command and I am getting all 4 of my floors to show up with the correct geometry at the correct height. When I then turn the roof visibility back on, the first floor disappears underground again when brought into IES. As for adding the windows and doors back into the model, I am using the automatic 0.2 projection distance and 2 angle tolerance. When I add them back without a roof, all of my windows and doors disappear on the 4th floor but I can see all the floors when there is no roof. If I have a roof and windows showing the first floor goes back underground but I have the windows and doors back on the 4th floor. Is pollination limited to 3 floors? Is there something else I can try?