Changing Unit Graphics

[Joij21]

Is it possible to change the graphics of a unit at a certain date? Like if say from 1492-1600 a militia unit would use an arquebusier graphic and then after use the default graphic?

 

[raystuttgart]

see here

Almost everything is possible in Civ4Col modding if you have appropriate modeding skills and enought time and motivation.
It is just a question if the change is worth it for you to invest the effort. (for your request, it is actually a lot of effort and might also affect performance)