Victory ISM Editor 4.13
Dear Community,
By popular request I’ve finally restored the Victory ISM Editor functionality in my vertex snap plugin!
I provide you here with an entire project that you can use to understand the setup:
Media Fire ~ Entire functional UE4 Project for 4.13
https://www.mediafire.com/?21nsv6zrlxdp35f
Overview Of Victory ISM Editor With Videos
The 4.13 Implementation
Basically my Victory ISM editor has to use a C++ based instanced static mesh actor in order to work correctly, as BP-added ISM components dont survive serialization for some reason, but my C++ class does, which is called VictoryISM.
The VictoryISM class is set in project settings -> Victory Ed Engine 
You also have to set in your DefaultEngine.ini that you want to use VictoryEdEngine your extended UnrealEdEngine class
Controls
Select a bunch of static mesh actors, and press I in order to merge them, press SHIFT + I to separate them again for editing.
Undo/Redo
My merging process works with undo/redo feature of UE4
