Interstice is an open-source Krita plugin designed specifically for professional painting applications, aimed at providing precise control and efficient workflows. It allows users to edit photos and artworks by selecting specific areas, ensuring seamless integration of the results. Additionally, Interstice.cloud is an online image generation service designed to make AI-assisted painting accessible to everyone instantly. Its background information indicates that it is a 100% free local hardware product that does not require a GPU, making it easy to download and use.