solved Babylon.js change object color from user list

[aaa]

Helo 

 i have a list of element populated form user database and i want to make  their 3d representation in webgl or babylon.js

I want to changing the object color depending to the user data from list

I mean to set color green for object were there id or name  are present in this list 

and set red for those absent 

How can i make this please ?

[brianzinn]

You would set the material of the mesh with the one that has the right color.  I made a PG (playground) for you:
https://www.babylonjs-playground.com/#GPC38X#1

So, I made an array with only one mesh in it:

var redMeshes = ['ribbon']

Then if it was in that array I used a different material (line 80). So, since 'box' wasn't in the list it ended up a different colour.  There is a Set that can be used instead of an array ['ribbon'], but is perhaps more advanced.
edit: just re-read your question, so I got green/red backwards, but hopefully that makes sense.

[aaa]

Thank you  @brianzinn this was interesting 

i appreciate your help this has solved well my problem    

it was aboute retrieving data from extra source like json or database and to set mention absent object by making their color on red

thankyou again