Skyrim Turning the Dawnguard into Vampires
In the Skyrim quest "Destroying the Dawnguard," the Dragonborn is tasked with killing all of the Dawnguard leaders. Using the Better Vampires mod, it is possible to kill all of them and resurrect them as vampires and still complete the quest. This was such a curious thing for me, that I just had to make a video about it.
Some things to note are that in the mod configuration menu under the Better Vampires options, the Dawnguard will be shown as allies despite them continuing to send hunting parties after the Dragonborn.
Additionally, the faces of the newly turning vampires will be a different shade than their body. This happens because they were never meant to become vampires, unlike the Dragonborn and a select few NPCs like your spouse and child. There is no way around this unless you modify their race in the Creation Kit (I haven't done this myself so do this at your own risk). One can temporally fix this by changing the NPC's weight.
This was captured using NVIDIA ShadowPlay.