Since 2009, Urban Forms Gallery has been transforming the landscape of Polish city Lodz with a pulsing wave of colorful, graphic images. Puerto Rican muralist Alexis Diaz (previously covered by HF) is the latest in a string of internationally-known street artists including Brazil's Os Gemeos, Belgium's ROA, and Australia's SHIDA, to have been invited to touch his brush to Poland's walls. Diaz's mural, entitled "Sentir," is part of world-wide series, "HOY." Translated to "Today," Diaz's current series is a personal reflection of the way in which the artist sees the world. Following murals in Vienna, France, the US, UK, Australia, and Tunisia, "Sentir," which translates to "to feel," is an affecting tribute to the ties between the natural world and human sensation.