How to add sparkles?

[DawnFilms]

If you’re looking for iridescence, check out this thread:

A complex approach - Iridescence in cycles

I was wandering today on how to make a more accurate iridescence effect. I know that using the layer weight and a rainbow ramp can produce some acceptable look, but not quite accurate. The big problem, is that cycles will color all the scattered rays with the same color at the point being rendered and not each ray by their own direction. So i was thinking how to overcome this, and have something more real. And then i remembered that the samples for each pixel don’t hit everytime in the same pr…

If you’re not using Cycles, try this add on:

Iridescence - Thin Film Shading