Fragmentation shards

[Mechanical Man]

I wonder how fragmentation shard ability/upgrade work, what are its effect. The upgrade apparently serves only for unlocking the ability. The tooltip of the ability says that increases the amount of damage done to medium and unarmored targets, but in the ability data fields I see only increase in splash damage, nothing that indicates about medium and unarmred armor.

 

[Reaper2008]

Maybe the upgrade does something?

 

[Pharaoh_]

If you open the "Game Interface" and scroll to "Text - General - Medium armor takes extra damage from Normal attacks, and reduces damage from Piercing, Magic, and Siege attacks.", you will realize that Medium armor gets reduced damage by Siege attacks.
Mortar Team does have Siege attack type (this is why the ability is clearly destinated for the Mortar Team unit or any unit with siege attack type), so, this ability increases the damage dealt to balance the damage reduction. The fact that the armor types are not directly modified is an issue to ask Mrs. Blizzard
Plus, it is definitely something triggered in the engine itself, since, the upgrade itself has no effect attached to it, yet, it has an effect in-game, another not-directly-changeable issue.

 

[Mechanical Man]

Upgrade does nothing. If you see its effects in upgrade editor, you will see None in all Effect fields.

I know how which damage is effective vs which armor, but I want to know all effects of the fragmentation ability as it seems that tooltip and data fields are incomplete.

 

[Pharaoh_]

Yes, this is what i am telling you. You were supposed to think in that point "hey!, let me have a unit taking damage by the mortar team, make a damage detection system and show the damage with the floating text, run the upgrade afterwards and see the results"
All of the effects is something unknown. I guess that, if the tooltip is indeed incomplete, no one will ever find out, unless they are full of luck