I have an elliptical mesh where i want to animate a revolving light animation.(Something like an Amazon echo led ring light).
For this animation i wanted to put frames where only partial mesh color is changed.
However not able to find a way to set material/color just to partial mesh.
Is there a way I can achieve this circulating led animation?
Something like this https://i0.wp.com/www.alphr.com/wp-content/uploads/2019/05/GUID-DF4C2188-D267-45FB-91E9-F9FEA112DF7C_en-US.gif?ssl=1
@PatrickRyan is the king for this 
@nitin, do you mean like this:
Babylon.js Product Page Demo (babylonjs.com)
Scroll down to the animating Material Parameters portion to see the effect. Basically, this is an emissive texture that I am animating the UVs on. This is the easiest way to accomplish this and it only takes some thoughtful setup in UV space for the mesh. You can use a very simple texture and just animate it how you like for the motion.
To see how I did it, you can take a look at the source which has the js and all the mesh assets and textures.
However, if you want it to be on a flat surface, you could also do a custom shader to animate the ring. Here is one example of animating graphics on a quad built only in a node material You can certainly apply this method to creating a colored ring like your example starting with that node material. Hope this helps.
All hail the King aka @PatrickRyan. Thanks a ton.
