The Melter is awesome when automating a Tinkers smeltery, but it is missing a few pieces.

• Mekanism:

  • Refined Obsidian
  • Glowstone Ingot

• Tinkers:

  • Sand/Glass -> Liquid Glass
  • Clay

• PlusTIC:

  • Botania:
    • Elementium
  • PSI:
    • Psimetal

• JAOPCA/PlusTIC:

  • Astral Sorcery:
    • Starmetal
  • Mystical Agriculture/Agraditions:
    • Soulium
    • Base Essence
    • Prudentium
    • Intermedium
    • Superium
    • Supremium

Probably more, but that's the ones I could find in our modpack

Ok, I've added all the recipes you've listed here, plus a few others that I found along the way. I have to say that I'm surprised that the seared glass recipe didn't work, though, as I added that a while back.

Maybe the issue is that you tried to make Seared Glass, which is a block? It is called Liquid Glass.
Also, Seared Stone is missing, although debatable if it should be meltable?

I looked at the Tinkers source code and the fluid is just called ‘glass’, which is what I’ve specified in the recipe...

hm, maybe because we default to Forestry glass?
Which is forestry:fluid.glass - which I think is the same anyways?

Well, whatever the case, it's not working in the upcoming v2.9 :)

Oh well ¯\_(ツ)_/¯
Still, the rest are really nice to have - just gotta find a workaround to make Mirion without waiting for glass to smelt somehow :P

Version 2.9 is out now with all the new recipes :)