Obviously this is likely only noticeable on non-default textures, but me being me and all about the textures I feel it worth noting.

Taking the diamond pipe as an example (as it has the colours for direction) 2 of the sides render the wrong way around.

I've put arrows on the textures to make it all more obvious.

As you can see on the green/yellow North face and the red/blue East face the arrows point away from each other:
http://snag.gy/I7V4q.jpg

However from the the opposite side of the pipes all the arrows are facing towards each other which should be "correct" as far as the textures go:
http://snag.gy/24aka.jpg

So the green/yellow North face and red/blue East face are rendering flipped on the vertical axis.

As I said tiny issue, but would be nice to have it fixed as it effects all pipes that use the rendering code and may not have symmetrical designs! :)

EDIT: didn't get a chance to read the other linked issue properly and made myself look stupid...

Anyway, I'll leave this and if a dev just keeps the stance of it it's a Forge or Mojang bug so be it.

I guess I'll just make my texture more symmetrical o.o

#723 I still don't believe this is a mojang issue though.

I believe this is an issue with how mojang lays out texture coordinates inconsistently. Its a pretty major rewrite to fix.

Same issue as #1287

Closing, as this is a duplicate of #1287.