What is the env params of testing or validating images?

[qizipeng]

Hi! Thanks for sharing your code and I think this is a wonderful work to solve the problems in relighting outdoor scenes by a NeRF framework. I have an issue with the env params consisting of 9*3 variables. I clearly know the network how to process the training images and optimize the env params from default values. However, I find that the network also takes the default values ​​as testing env params and do not optimize them. if i dont misunderstand. Is this reasonable? How do u get the default values?

Looking forward to your answer, Thanks again!