Hello. I'm looking for an AI tool that can generate different thumbnail concepts for my YouTube videos. I'm not looking for AI to create the actual thumbnail, but just to give me MULTIPLE visual designs/mockups (based on a single prompt), from which I can choose one to develop with my graphic designer. Are there any tools like this that you can recommend? I tested 1of10 - the output isn't terrible, but it's way too expensive and doesn't really allow you to chat with it (so you can't iterate on a concept). Thank you!