Loosely based on the rose window of St. Andre Cathedral of Bordeaux. The back surface left flat to simplify 3d printing.

The model is made with centimeters as default units (Unreal Engine habit), assuming the real window is about 5 meters. The STL model is scaled down to about 20cm diameter.

The model has 2 UV channels. UV1 is autompatically unwrapped side polygons and separared front and back surfaces with no overpapped UVs and everything within [0;1] range. UV2 is a simple projection with front and back surfaces overlapped.