Leonardo.ai is a creative AI image generator with a focus on creating game assets such as textures, objects, and concept art. The image generator is accessed via the Leonardo dashboard on their main website and is completely free to use, although they are currently accepting sign ups on a queue-based system. Leonardo.ai is a great AI image generator for artists, designers, developers, and more. It also has some advanced features in the dashboard which will let you do things like upscaling, variations, img2img, etc. You can use the community feed to see recent and trending creations for inspiration, and even see which prompt was used to generate it.