Notice that this dialog also shows the models Surface Count and the Texture Size. It is recommended to keep the number of exported surfaces below 500,000 and exported texture size below 50 MB.
The more objects that are present in a plan, the higher the surface count will be. Turning off the display of any layers that don't need to exported with the model is recommended. Please see the Related Articles
section below for more information on toggling the display of layers.
If the models Texture Size is over 50 MB, it's likely that detailed and complex materials have been applied and used on objects in relation to your structure. Decreasing the amount of detailed materials that are present within the plan prior to export will help greatly with the loading and viewing experience of the model.