If a scene contains two or more levels, you will need to manually add these levels to the project and allocate the relevant Spatial Objects to each. Also, any vertical circulation objects (escalators or stairs) linking the levels need their start and end points to be associated with the correct levels. You can do all this in the Level Manager. For more information, see Adding Levels .

Each imported scene automatically contains an initial ‘Ground level’ but you can nominate any level as the Ground level by highlighting it in the ‘Level Manager’ and clicking the Set ground button.