Blending in linear space would require sRGB support for the canvas back buffer I guess. HDR would be a plus but not mandatory. This is a coincidence that it works in hdr in the PG. It is only related to the extra pass done in linear space.
Blending in linear space would require sRGB support for the canvas back buffer I guess. HDR would be a plus but not mandatory. This is a coincidence that it works in hdr in the PG. It is only related to the extra pass done in linear space.