Microbial Shroud issue

Bug Report
1

Microbial Shroud’s reduces damage by significantly more than 50% in practice.

This bug is a consequence of Microbial Shroud’s damage reduction applying before armor. The resulting damage reduction varies wildly from unit to unit.

Examples:

  • Carriers at +3 weapons against a +3 armor target (no base armor) deal 80% less damage than normal if the target is under Microbial Shroud.
  • Battlecruisers deal 68.75% less damage than normal under the same conditions.
  • Void Rays deal 75% less damage to unarmored units under the same conditions, or 65% less damage if the target is armored and 59.375% less damage if the target is armored and the Void Ray is charged.
2

I did a calculation before with a battlecruiser attacking a hydralisk. The shroud first reduces the incoming damage A ignoring the armor value B. Then B is deducted from the 0.5 A damage, so the final damage is 0.5 A - B, instead of 0.5 (A - B)

3

When Microbial Shroud was first introduced in the game, I tested it and found that its mechanism is that it reduces the damage to half first, then calculates armor.
For example, 0/0 BC does 8/2-0 = 4 damage against 0/0 hydralisk, while 3/3 BC does 11/2-3=2.5 damage against 3/3 hydralisk.
I believe it is intended just like how splash (also mutalisk’s glaive) works.

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