If you look at the coordinates of the architectural project you are reading, you will see that it is in an unrelated place. The y coordinate of the A axis of your ground floor is -11900m, the y coordinate of the A axis of your 5th floor is -8m. After reading the DWG, move your drawing so that the bottom left of your building is roughly at the origin, then start creating your objects. You can't see it in 3D, probably because a part of your building is formed in an unrelated place. Check whether the carrier elements and the system formed at each stage are correct. In fact, if your architectural file does not create automatic elements in a very healthy way, you can even consider creating the axes and columns automatically and entering the beams manually. The idea that I'll have the program read everything automatically from the DWG and then press F9 and I'll be done is not correct, because there is no guarantee that everything will be read properly from every dwg, since there is no certain standard for dwg drawings. You should initially consider creating a system from DWG and 2D drawing as a helpful tool when creating your element coordinates and dimensions. Depending on the situation, you may need to intervene and organize your system. If you pay attention to these, I think you will work more smoothly. Copy your ladder with ctrl+c without any action, open the new project with the default black background template and paste it with ctrl+v. This way, when I get the ladder drawing, it is formed properly. Most likely, there is a problem in your staircase drawing because of the inconsistency between the project coordinates and the excessively large coordinates. Good work