Description
Asynchronously readback from GPU to disk.
0: Synchronously copy from GPU to disk with extra carefulness to avoid OOM (default);
1: Asynchronously copy from GPU to disk with dedicated staging resources pool. May run OOM. Please consider using r.DumpGPU.Root to minimise amount of passes to stream and r.Test.SecondaryUpscaleOverride to reduce resource size to minimise OOM and disk bandwidth bottleneck per frame.