So I was playing Create, and wondered: Why are the bar textures split down the middle, instead of having a single block like glass panes. This is especially obvious if you look at the supporting pillars.
I assume they just copied the iron bar texture, but that one is fine with being offset, since it's quite asymmetrical.
So I decided to make this super simple resourcepack to fix this!
I just offset the copper bar item texture 8 pixels to the right, and slightly edited the andesite bar texture to add 2 pillars, instead of 1. This won't change anything with the textures or model on the block.
This does mean that this resource pack doesn't interact nicely with other resource packs that edit the bar texture/model, but it shouldn't break anything, just override/be overridden by other packs. I might add a second version that changes the copper bar into having the old Create Copper Style, and will edit this if I do.