Solid boxes, not really sure, just like the look of them. Saw them in some other tags I used as inspiration and thought I'd give it a whirl. ;)
Yeah the first tag got the quality irked at some stage of adjustments and stuff, so it went a bit claggy...
But thanks for the comments! :D
I sent a started version of this to Kaori for a collab, but this is how I finished it up. Shall edit whenever she gets around to it. ;)