One of the best is 3D AI Studio. This tool is geared for generating high-quality 3D assets from text or images, with features like Text to 3D, Image to 3D, AI Texturing and more. It's fast at generating assets and has an intuitive interface, making it a good option for game developers and animators.
Another good option is Leonardo. This image generator produces high-quality visual assets at scale, with features like AI Canvas for editing and refining designs, and 3D texture generation. It's good for game assets, concept art and product photography, and offers free and paid subscription tiers.
If you want to turn sketches into photorealistic images and 3D renders, NewArc.ai is worth a look. It can generate design options and visualize concepts rapidly, which is good for fashion, automotive and architecture. It's easy to use, and flexible pricing means it's good for solo creators or businesses.