Is looking at pornographic films like the first glance that is without sin, and what is the solution for repenting from that?

You must repent from watching pornography, because it is a sin. Persisting in a minor sin and repeating it transforms it into a major one. It was said, "No major sin remains major with repentance, nor does a minor sin remain minor with persistence." Persistence means repeating a minor sin in a way that indicates a lack of concern for religious matters. The Prophet, peace and blessings be upon him, warned against a Muslim's complacency regarding minor sins, because they can destroy their perpetrator if indulged in.