Not exactly: I'll post a screen to show the problem with the matte activated.
Here you see my initial view when I start the generator. Zooming in or out the browser wont fix it.
Export png is doing nothing for me at the moment. SVG is working fine.
311 days ago(+1)
OK, that's weird, I have no idea what could it be. Have you tried the Arcana version (https://watabou.github.io/perilous-shores/)?
311 days ago(+2)
Yeah its indeed weird. PNG works on any other generator apart from Perilious Shores. The link you provided works. I will let you know if any changes occur and will use github. Thank you so much for your lightspeed replies!!! :D
152 days ago(+1)
Hi! I've run into the same kind of problem; it's only on the itch.io website, not your github link or on the downloaded itch.io app, so there's a large chance it's not relevant.
It's not just the frame; the text boxes themselves seem to be cutting off. 
Here's the github/permalink version: https://watabou.github.io/perilous-shores/?seed=1114274662&tags=archipelago,wetl...
Obviously not a huge deal, but just wanted to file a bug report / let you know it's something that happens occasionally