Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Help/Tips/Tricks 2 Small runes wont combine - [solved]

The online recipes show you can combine 2 small runes into a medium, or 3 small into a large.

Whenever I tried to combine 2 small runes, I get "Invalid Combination".

(I tried using "small masterwork rune").
I also tried combining 3 with same result. I tried from a character that has lore of 4 (although I did not see any indication in game that crafting was limited by lore skill and I see no crafting-specific skills like we had in DOS1).

I was able to create a small fire rune with no problem...the only issue seems to be combining runes to make larger runes.

Am I missing something here or should any character be able to combine 2 small runes to make a medium?

I found the answer once I got a book in game that had the rune recipes.

Medium rune = small rune + small rune + pixie dust.

The rune recipe pages that I found online had not mentioned pixie dust is also required to combine runes. I guess I need to find more stardust plants. I have only found one in the wild so far, and one on a vendor....and I use alt-key everyone to scan for stuff since my main char has TK3 so can easily grab stuff from all over current area.