Cycles, animate the color on part of an object Hello I am using Cycles trying to change the color of part of an object. Specifically in this case I am trying to change the color of part of a sphere from blue to green, while the rest of the sphere remains blue.

As you can see I selected part of the sphere and when I hover my mouse over the assign button and hit the I button for keyframe I get the error in the top of "Button doesn't appear to have any property information attached"

I heard that almost any value or button can be animated in Blender. So am I doing something wrong? Is there a work around for this? Is it possible to animate multiple materials on an object in blender?
Create a new material for the part that you want to change and assign it to the section of the mesh you want to affect. 

(see : Add different materials to different parts of a mesh?)


Then the color change can be done in different ways.

Then over over the color of the material, add a keyframe. Change to a different frame, change the color and add another keyframe.



A different way would be to use an RGB mix node to contol the color of your object and animate the factor value:



Or Create two different shaders with the qualities you are after, add a mix shader node and animate the way they mix.