Facing ratio question

[chiuhua]

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:

getting the "incidence angle" of a locator compared to a mesh

Hello, Hopefully i can get some creative minds to help me here. Maybe the sampler info is the answer, however i am unsure how… I would like to have a toon shader that rather than a light determining where the lighter areas of the shader are, i would like a locator to determine this. Think of a point light. where it doesnt need a forward direction,nor an up direction, this is simply based on a center point ( being the locator). Essentially it is a way to force a light incidence effect but ba…

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.
Thanks!

[VanDerGoes]

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.