For anyone wondering how I create my thumbnails for a lot of my recent bots:
I use Google Gemini with about 5 source images from wiki entries, as well as my own art, set it to portrait style, and ask for it to be made in the style of J.C Leyendecker. That, and additional queries for how I want the character to emote, as well as resolution increases. All free--no premium version needed.
Results can vary, obviously.
