Some pieces are best seen when the south west is pounding and rain is coming in flat, “Spring” by ARGUS is one of them. Painted way back in 2015 or so, decaying has taken its toll. Hardly to be seen when the wall is dry. Shines when the wall is soaked. These pics are respectively from 2015, 2020 (dry wall) and 2023 (soaking wet wall).