Brecht Van Lommel
33f5e8f239
For non-raw, non-sRGB color spaces, always use half float even if that uses more memory. Otherwise the precision loss from conversion to scene linear or sRGB (as natively understood by the texture sampling) can be too much. This also required a change to do alpha association ourselves instead of OIIO, because in OIIO alpha multiplication happens before conversion to half float and that gives too much precision loss. Ref T68926