is there a minimum damage? how...

[Chris Rice]

Originally Posted by hcobb

When does minimum damage take effect?

Goblin fires a fine arrow (+1 damage) that is poisoned and branded from a small bow (nominally 1d-1) and rolls a 1 on the damage die against cloth armor. Roll for poison damage or not?

Note that the arrow itself costs $10 (fine) + $60 (branded) + $200 (weapon poison) so use the highest DX archer.

Not sure what you're talking about. All damage modifiers are added together at the same time. So (1d6 -1, +1) is just 1d6 as the modifiers cancel each other out. In the example you quoted the die roll is 1, the modifiers cancel each other out, so the damage stays at 1. Cloth armour stops 1 hit, so the armour fails to penetrate and the poison has no effect.