Thank you for this post, We all proud of you.
For one educational project, I am trying to evaluate the effect of thick water wall on daylight distribution inside a room. (as you know it is not possible with glass material)
this water wall is oriented to the south with thickness about 25 cm.
I have defined a dielectric material in radiance for Water as this:
void dielectric Water
5 0.8695 0.8695 0.8695 1.33 0
#red_transmissivity green_transmissivity blue_transmissivity index_of_refraction 0
Therefore, I defined 2 surfaces for front and back and since there is just one layer of dielectric, I don’t need using any interface material. But the direction of these surface is very tricky. both directions have to be toward outside (?)
should I rotate them inside in reverse ray tracing??? The resultant values are significantly different.
any comments would be really helpful for me.
thanks in advance.