What causes a neck seam?
A neck seam can be caused by mismatched textures (typically normal or specular maps) or improperly flagged body meshes. A neck gap can be caused by using an imported head that was exported for a different body weight, or using an outfit that only supports one extreme (i.e. 0% or 100%) weight due to not having a working weight slider.
How to fix the NPC with the neck gap?
1 In console, select the NPC which has the neck gap. ( this mod will make sure that the reference you have selected is the right reference. 2 Type in “SetNPCWeight ###” [replace ## with the value which was shown in tes5edit, as an integer] (round to the nearest integer if you have to). 3 Make a new save and reload the game.
Can I view Skyrim Special Edition discussions at work?
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