How to make grating as reflective or defactive in nature

[millermuttu]

Hello, currently the grating is transmissive in nature, how to make the same as reflective or defractive in nature?

[vishwa91]

Thank you for the note. You can set angle to 180 degrees to get reflective mode. If that does not work, please let me know and I will correct it in the code.

[millermuttu]

I tried the same, but it didn't work, please let me know what else can be tried.