Vizcom

Vizcom is an AI for generating realistic images based on your sketches. You can upload a ready-made sketch or draw directly in the editor, then add a prompt and start the generation.

You can try it for free - just sign up here: app.vizcom.ai. The image quality is impressive, though the lack of real-time generation mode might be a downside. However, this service follows a slightly different approach, so it may not even be necessary.