CGI-Hentai refers to a specific type of adult animation. The term "hentai" comes from Japan and generally means "perversion" or "abnormality." In the context of adult content, it specifically refers to Japanese anime pornography. The addition of "CGI" (Computer Generated Imagery) indicates that the animation is created using digital tools and software instead of traditional hand-drawn techniques.
In summary, CGI-Hentai refers to a category of animated adult content that originates from Japan and is created using computer graphics. This genre often features fantastical or otherworldly themes and characters, with varying levels of explicit content.