Sources for Void Generator

Bastion door (https://www.thingiverse.com/thing:1157162)
anti aircraft emplacement (https://www.thingiverse.com/thing:1218376)
Generator Objective Markers (https://www.thingiverse.com/thing:1341114)
Adeptus Mechanicus Blast Templates for Warhammer (https://www.thingiverse.com/thing:1699516)
