Facing ratio question


Hello everyone, I know this is really old topic but I can’t find a good solution for long time… just wondering is there any way I can have my incidence “angled” using sampler info’s facing ratio channel?

found the closest answer by searching on website:

I succeeded recreate the network and make the locator drive the ramp but it would be better if facing ratio can give me a similar result like this. some kind of fake light coming from the top no matter how camera move.

any thought would be help.


I am not at the office so I can’t try this solution but maybe you could use a facing ratio driven by a vertical ramp mapped with a 3d projection.