In 1949, she began courses at the Art Students League of New York, where she studied painting with Yasuo Kuniyoshi, Morris Kantor and Vaclav Vytlacil.

Her early paintings from the late 1940s evidence the influence of her teacher Yasuo Kuniyoshi, both in terms of their subject matter and color palette.

Her 1961 show at Landry Gallery included complementary paintings and corrugated board collages, but also several large-scale "environments."

Two drawings housed in the collection of the Metropolitan Museum of Art show that Tania had arrived at her geometric style at least by 1967.

In this period, she also produced large-scale aluminum sculptures that translated the overlapping triangles composition into multi-planar, three-dimensional form.

In a statement from 1978, Tania likened her triangles to rooftops, seen from above: "For a few years now I have been thinking of my paintings (always executed on the floor) as roof tops seen from the air – in the clouds – in the sun – in the night.

From roughly 1966, when she co-founded City Walls Inc., Tania had begun to devote much of her energy to public and outdoor art projects.