ToME: the Tales of Maj'Eyal

Enemies killed exclusively by rogue traps do not drop alchemical ingredients.

I do not know if an enemy wounded by rogue melee and then finished by a trap will drop ingredients or not. I'll test when I meet the next enemy on my alchemist list.

Edit:
Just tested the above. If I stab an enemy and then kill it with a trap, I receive an ingredient as expected.

Edit again:
Just killed a pile of wretchlings with a gas trap, and none dropped an ingredient. A moment later, I killed an ice ant with a bear trap (without striking the ice ant myself) and did receive the ingredient.

It seems like some traps yield the message "Explosion/Nightshade/Poison Gas trap killed enemy". Those traps don't yield ingredients. Bear traps yield the message "Kneesie (my rogue) killed enemy". Bear traps do yield ingredients.

I wonder if this also applies to golems?

Though, if it applied to summons, someone would definitely have noticed by now...

fixed