Why we need rescale in realnvp?

[One-punch24]

Thank you for your code. It is very clean and smart.

I have a small question, why we need rescale operation in

normalizing-flows-pytorch/flows/coupling.py

Line 107 in f5238fa

s = torch.tanh(params[:, self.out_chs:]) * self.s_log_scale + self.s_bias