I did an Unreal Engine stream on Twitch today and through this would make for a nice thumbnail. I was demonstrating a DAZ Character walking around in Meadow Environment by NatureManufacture, using the Ultra Dynamic Sky by Everett Gunther. One day I'll learn how to export this as a hi-res image directly from the engine, rather than taking a screenshot of the stream recording LOL
Catch more 3D live streams here: https://twitch.tv/WPguru