The Model contains Arm Strong Gypsum False Ceiling Made using Itoo Railclone. The railclone Is area Based and hence parametric and can be used parametrically in any project. materials are easy to change as teh railclone is set yo use the material of the base objects, so all you need to change is the material of individual object also in the scene and you are good to go. the model has 4 variatios of lights from ID 1-4 and 3 variations of diffusers id from 1-3. These can be changed without going into the settings of railclone as they have been provided as parameters. Check Image Railclone_01.jpg. ID clarity can be got from image ASTRONG_ID.jpg. Various Permutations and combinations are possible. Also you can easily add your own models into the lights and panels by easily plugging in mode models a long as you have basic knowledge of creating railclone. also as it is a railclone the model provided is only for 3dsmax . other formats will not work parametrically.Along with the railclone of the false ceiling wihich is a 2d array provided are models of cameras and smoke detectors and a ceiling unit ac which can be maually placed or created into a linear Railclone to be placed more preceisely. Please feel free to contat me in case help i needed to modify the railclone object or in any other way