The addons THREEf and THREEp were updated. 
They now support two exploded view modes in r90 - as in the THREEg addon.
It runs with revision 90 of three.js.
- available on GitHub
Inside the sandbox:
if non indexed 
‘center’ is default now!
This simple example shows the difference.
waffled grid,
centerY is v * v (centerpoint y by height)
and an explode of 0.1.
‘center’ 
‘normal’ 