Neither you nor I were satisfied with the new look of those furnace-lookalike blocks. I gave those yet another go and chose a more standard approach this time. Here are the results :
Dev news : furnace rework (again)
Minecraft vanilla-style texture pack with POM & LabPBR compliant — Support my other projects at https://www.patreon.com/hardtopnet/ — YouTube teaser at https://www.youtube.com/watch?v=p5fh9JhTIF4