The grey warm evening of August had descended upon the city and a mild warm air, a memory of summer, circulated in the streets. The streets, shuttered for the repose of Sunday, swarmed with a gaily coloured crowed. Like illuminated pearls the lamps shone from the summits of their tall poles upon the living texture below which, changing shape and hue unceasingly, sent up into the warm grey evening air an unchanging unceasing murmur.
<Two Gallants by James Joyce>
質問１ the living textureは何を指しているのでしょうか？
質問2 分詞構文 changing shape and hue unceasinglyの主体はどれでしょうか？

以上2点につき、解答していただきたく存じます。よろしくお願いします。