Piotrek Marczak

You have to group copy template's grid points. Then after copy put group transfer to transfer groups from points to packed points (preserve groups in Copy doesn't work?). In material stylesheet set condition type to Point Group.

edit: nevermind, didn't read properly what you want to achieve

THanks for color tips!
One more thing, L key in VOPs seems to arrange nodes top-down instead of left-right

I like UI so far!
some minor things I would love to see
+ Preference for drag&drop when wiring nodes (instead of click&click)
+ faster way to display attributes (like rmb on attribute (in vexpression text field)->display in viewport)
+double&triple click support in vexpression editor
+TAB menu history on left side column next to node list, not on the bottom of node list
+drag&drop nodes from TAB menu
+ preference for custom color for viewport background (or 3rd color option, something between LIght & Dark)