Just wanted to comment and say I think your tileset is fantastic. Why use an AI art thumbnail that doesn't match? I'm sure people would be happy to see what you've made, it's quite good.
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Thank you. Thumbnails are a weak point for me and making a good one that'll catch peoples' eye can take as long or longer than making the assets themselves. If I was selling the thumbnail I would have done it myself. I'm not set on keeping these, but I am testing them against my usual thumbnails and they have gotten more clicks.