The penalties for peeing in public in Texas can range from fines of up to $500 to facing charges that might lead to community service or even a short jail term, depending on the circumstances and whether other offenses are involved. The variance in these penalties is due to factors such as the offender’s intent, location of the act, prior offenses, and any additional disruptive behavior associated with the incident.

https://1800lionlaw.com/is-peeing-in-public-illegal-in-texas/

That said, baring yourself in some alley may expose you to dangers other than the cops.