This is the first completed design. It's what I planned on putting at the top of the page, before I discovered that Squarespace doesn't provide an option for removing the text in the banner.
The font is OpenDyslexic, which I picked because I think the combination between accessibility and more organic-looking shapes in fonts designed for dyslexia makes for a very solarpunk combination. (That's actually one of the first few things I wrote about solarpunk, back in September, before I even had a separate solarpunk Tumblr.)
The stained glass look is because one of the first big aesthetic memes of the solarpunk community was stained glass windows made of transparent solar cells. The yellow bits in the middle are chopped up chunks of a photo of a stained glass window by Louis Comfort Tiffany, and the wood is a strip of a public domain photo of some untreated wood, adjusted in brightness and contrast till it looked stained and sliced up into four strips.
The other stained glass I made myself, in separate Photoshop files: render clouds, then liquify and squiggle, then messed with a bunch of levels until I felt good about how it looked. With the green, I also adjusted the brightness and contrast a few times between cutting it up so there'd be more variety among adjacent chunks of glass.
I wanted to make the text a more consistent color, that really stood out, and I also couldn't figure out how to make it transparent but keep the stroke. So I made it light-ish blue -- the exact color I used for the blue accents in the web design here -- and added the water pattern overlay at like 30 percent opacity. (I could definitely open the file to give this info with more detail, but, y'know, that's like five clicks.)