I want to do a film explaining a machine with many components (gears, chains, pipes etc.) which basically are of the same material (e. g. metal).
In the animation I want to color-highlight (emphasize) the according components which are important in a certain time slot, namely when explaining, say, parts 1,4,5,7,8,34 of the machine I want to highlight those parts 1,4,5,7,8,34 etc.
E. g. make a single certain gear glow or strongly blink at a certain time, then make 10 others of the machine glow a minute later etc.
But I do not want to create a single new material for each component which I then may animate in color.
I could do that maybe in rendering layers via the compositor as I have understood (beginner) but they are quite limited in the layer numbers.
So for each difference in key frames in the color animation I would need to create a separate material. This would be tedious and unflexible and result in tens or hundreds of materials although in the default status they are all of the same appearance (e.g. metal). I just need temporary material modifications across thos many similar objects.
Is there something such as a ‘color modifier’ or material modifier’ which may be animated for objects? E. g. adding an ‘animatable’ glow (emission) or a color or a blinking effect at object level (not to a material) for a certain time?