highp is technically specified as only min float16, right? (Though given the perf cost of going for a larger float it seems unlikely any implementation will?)

highp is technically specified as only min float16, right? (Though given the perf cost of going for a larger float it seems unlikely any implementation will?) Last time I spoke to gw there were fair differences in WebRender down to rounding error between different GPUs (and drivers, IIRC), though almost certainly you'll know better the situation nowadays (and wrt Pathfinder).