If High Quality mode is calculated with 16bit colour and alpha channels, is HDR output possible, or are the Composition and output devices (screens, Spout, virtual devices, NDI, whatever) always downsampled back to 8bits per channel (eg by a value >> 8 kind of operation)?
If it is possible to get more than 8bit output, what hardware examples are there of this actually known to work, and what are some of the details (eg bit depth, any kind of HDR scheme used such as PQ or HLG)?