Then how come it does not work on my end I follow the usual instruction on installing the texture modYes, it have effect on already created orlds. It is how texture packs are suppored to work like.
EDIT: I may did a dumb on my part, I did not add the texture pack file in the Tmodloader folder that also has the "TexturePack" folder like so. It is kind of misleading that on the thread that I follow on installing texture pack does not mention anything about this step. Unless there is something obvious that I am missing here