Before you comment, i changed the thaumcraft amber item and not the block cuz its already transparent.
Ever wanted your Thaumcraft or Biomes O' Plenty amber to be transparent? No? Well then.
Yeah i know its pretty useless but i kinda just made it because i wanted it to be transparent.
Links:
Thaumcraft: https://minecraft.curseforge.com/projects/thaumcraft
Biomes O' Plenty: https://minecraft.curseforge.com/projects/biomes-o-plenty
May make the other BOP gems transparent too in the future:]