unknown spider in Austin TX
Hi, this might be a young Shamrock Orbweaver, Araneus trifolium. It may be a female with a tiny male in the foreground on the white thing. The females are relatively giant compared to the males, which are normal spider sizes. The females have a longer growth period. The males have to approach for mating very carefully to avoid getting eaten before they get to mate.
Maybe Neoscona crucifera. Not sure. Orb-weaver at any rate.