I had a play with this, is cool but I have a crappier computer than most, my card is a 980ti.
I set my lightmasses on my foliage really low to compensate but these being in Datasmith I cannot seem to do that.
now I have a really weird question
the plugin raised my hopes with what I found
I really really want to retexture those Twinmotion people in historical clothing for my medieval villages etc. 
(would prefer animated imports of my DAZ and iClone people but willing to work with what can be done)
My people saved to my User library if I open them in notepad and are carrying stuff such as a shopping bag of veggies, that stuff has a path
twinmotionToUnrealContent/Library/Furnitures/Home/Kitchen/Food/vegetables
so it is substituting the plugin stuff.
my people also have a path
Emilie for example
MI_Body mIsHiddenSubElement mNativeObjectPath ; /Game/Library/Characters/Humans/EmilieCity/MI_Body.MI_Body
but of course we have a cooked Twinmotion-WindowsNoEditor.pak
however she is also an Anima person and I have an FBX with textures
I can create uassets from
can I do what I do with Skyrim where I add a folder structure in my Bethesda BSA data with substitute textures in that override the game ones?
I tried C:\Program Files\Epic Games\Twinmotion2020.2\Twinmotion\Content\Game\Library\Characters\Humans\EmilieCity
with MI_Body.MI_Body.uasset for material and texture MI_Body.MI_Body.jpg in there as well as my original texture but I am pretty certain I am not getting the file types and names right if it even would work