COLLADA files are 3D objects usually created or converted with Google SketchUp; they are available in the Internet and can be downloaded for personal use following the license terms available in the web site. In order to find them you can open a search engine and type Google Wharehouse.
At the time of writing this manual the current address is: https://3dwarehouse.sketchup.com.
As you can see there are many thousands of items available for any room type. Search the one you need, download and save the COLLADA file (.DAE file extension). Once saved the file in your computer, follow up the instructions you have seen in the previous paragraph, locate and load the .dae file in your project.
Usually external files are simple 3D files and do not have any material associated to their layers. Later on in this chapter you will see how to assign new materials to the available sections of any object.
Note that some .dae files may not appear properly in the Navigation and/or rendering image; this may be caused by the design technique used by the designer(3D Face normal orientation). In these cases, usually it is enough to open the file again with SketchUp, and properly change wrong normals.
NOTE: Collada files can be imported just in 32 bit software versions, hence up to v. 2016
This article is valid for DomuS3D® 2017 and later versions