Modern Furnace
Allows for the 1.14+ Furnace textures to be used with Programmer Art and older versions of Minecraft.
If you want something like this for Cobblestone/Mossy Cobblestone, feel free to check out: /resourcepacks/modern-cobblestone
In order to work with Programmer Art, please layer this resource pack above it otherwise the original textures will still be visible.
This extremely niche resource pack allows you to play older versions of Minecraft (or use the Programmer Art pack) with the current Furnace texture created by Jappa. There isn't anything else to this, it's literally just the 1.14 furnace texture and that's it.
I created this for personal use as I much prefer the newer Furnace to the older asymetrical one but I figured there's at least one person out there who might want a similar thing so I uploaded it (along with several backports) to Modrinth.
DISCALIMER: I will not be porting or backporting this pack to any Snapshots or versions of Minecraft older than 1.6.1. However, you are more than welcome to do so yourself if you please.