Adding ceiling to 3d room model
 

I'm trying to build a virtual environment that will look relatively natural for an experiment and could use some help:

I have loaded a model of a room from 3d warehouse but need to add a ceiling for it to look normal
Is there a way to add a simple neutral color/ pattern ceiling at a specific height? the room I need it for is pretty big so the ceiling should be long/ with length by demand
couldn't find anything suitable on 3d warehouse.

Thank you in advanced

You should be able to load it into SketchUp and make the modification there. There are many online tutorials for SketchUp modeling. The following is a tutorial related to the SketchUp to Vizard workflow:

https://sites.google.com/worldviz.co...-workflow/home