no sorry. you can’t edit a mesh with several subsets.
but you could create 4 different meshes with those 8 vertices. and for that you could also use subspreads of the original indexes coming outof mesh split.
so you have two options:
use original vertexbuffer (just edited by the pointeditor). with original i mean original vertex count (8) for each of your sides (even when each of them only needs 4). then use getspread on the original indexes and create 4 meshes with 4 different getspreads combined with 4 mesh join nodes.
or select the right 4 vertices for each of the sides, put them in 4 vertexbuffer join nodes. then use a trivial indexbuffer connecting those four points. you can use the indices you get when connecting a grid ex9 with a mesh split.
thx for liking mesheditor!
ah before i forget: you could also write a plugin that outputs a mesh with subsets… ;) (not suggested)