About the rescaling of roughness in Stage 2.

[K-nowing]

Thank you for your work!

From the code of stage 2, why do you set the min of roughness 0.04?

NeRO/network/field.py

Line 919 in 7f36735

rmax, rmin = 1.0, 0.04**2

Is there a physical reason for this, or is it just a hyperparameter?

Thanks!

[liuyuan-pal]

Hi, this is only a hyperparameter. When I use 0, there may be some numerical issues when computing the BRDF and there are no perfectly smooth objects. Thus, I chose this 0.04 threshold. Thank you!

[K-nowing]

Thank you!