If you're looking for a Masterpiece X alternative, 3D AI Studio is worth a look. This AI-based tool lets you turn text or images into high-quality 3D assets like models, animations and textures in a matter of seconds. It includes Text to 3D, Image to 3D, AI Texturing and other tools. It's geared to be easy to use and fast, so it's good for pros and hobbyists working on games and animation.
Another serious contender is Meshy, which offers text-to-3D and image-to-3D conversions, plus AI texturing and automated PBR map generation. Meshy supports a variety of art styles and formats, so it's good for AR/VR, games and digital design projects. It offers several pricing tiers, including a free option, and a community showcase with tutorials to help you get up to speed and speed up your 3D content creation.