Vertical material progress bar

I think I understand what you mean

actually I’m doing that in my material (in attachement)

to be more explainfull I want to do that : UE4 ProgressBar material - YouTube
but verticaly with my Green and blue channel (separatly)

EDIT :

I get It working

using this : http://martiancraft.com/img/blog/articles/large/20150221_disintegrate-13-m.png