Is it permissible to look at pictures of semi naked or naked women, unknown to us, such as those appearing on…

Answer

Generally speaking, watching moving pictures and photographs does have not the same ruling as looking in reality at people non-maḥram to you. Accordingly, there is no objection to it, as per Islamic law, if it is not done with lust, evil intention, and does not lead to a bad result. However, since watching obscene pictures is inherently intertwined with looking with sexual urge, and it is a precursor to committing ḥarām acts, it is, therefore, ḥarām.