the textures are not jet finished, so it was easy to just take existing ones while focusing on the main functionality.
one of the two blocks acts as the Emitter, the others extent the Emitters Shield. I removed the arcshield arc texture because i thought it would look cooler that way. In Star Wars or Star Trek, you cannot see the Shield too, unless you hit it with something. hover your Cursor over the part to see if it is active. (you can tell by the blue reload bar). I will add an active/inactive indicator sprite though.
And in general, i plan on pulling the individual Emitters together in something like a "Shield Generator room". Like that you could have the emitter internally, (like the bubble shields from the popular star wars mod), and have all armor segments within its reach activate. In build mode you could check the Coverage just like the ftl drives.
(This update will most likely not be published too soon, 'cause i have school stuff to do...)