fmt now automatically prints the numeric value of an enum class member by default, so we don't need to use casts any more.
Reduces the line noise in our code a bit.
Co-Authored-By: LC <712067+lioncash@users.noreply.github.com>
The FresnelSelector was already working like a bitfield, so just make it actual bitfield to reduce redundant code. Also, it is already confirmed that this field also affects shadow on alpha. Given that the only two source that can affect alpha components are both controlled by this field, this field should be renamed to a general alpha switch
