I am interested in making a material that reproduces the subtle surface sparkle that is seen in some types of rock. It’s a kind of glitter in appearance - flecks of something within the material. Specular Hematite is an example of this, or anything with flecks of Mica.
Does anyone know of a method to create very small “sparkles” that only reflect light at certain angles (this way it could be used for animation)? Alternatively, a version that could be used for single images would be good too (i.e. any reasonable approximation of some sparkling effect would be great).
Is this likely to be a compositor thing?