About density_bias and rgb_bias

[AAAeray]

Hi GuChun, Thanks for your great work,I noticed there are some manually set bias in the MLP,for example: density_bias: float = -1. # Shift added to raw densities pre-activation. rgb_bias: float = 0. # The shift added to raw colors pre-activation. I don't understand why there should have bias and why it set the bias=-1 for density and bias=0 for rgb. If I add some new features after the MLP, What bias should I set. Thanks a lot.

[SuLvXiangXin]

@AAAeray I just follow the setting in multinerf and zipnerf, feel free to modify it.