How difficult would it be to have phong specular highlights be obscured by objects' cast shadows?

[anonymous_user_6a619fcd]

Shadow casting will only help with analytical lights. You will still get specular highlights from the environment and sky. The only general way to prevent that is using realtime reflections of some kind. Screen space reflections will work with limitations. Planar reflecions if you only care about flat surfaces. If you want it to be truly correct in all cases, ray tracing is the only way.

Was this directed at me? Do you know of way to have the cast shadows make the phong reflections disappear?

I have tried this anisotropic shader material:
https://forums.unrealengine.com/comm…-hair-material

While cast shadows don’t cause the highlights to disappear completely (with the anisotropic), it does cause them to become considerably darker, which may work well enough for my purposes.

I would like to know how something similar can be done for phong materal.