Make Iray effects bloom around light sources?

necroscension

This may be more advanced than what this forum is intended, but is there a way to allow lighting effects on objects in Iray to "bloom" around the reflected light on the object? I'm not talking about the bloom filter affect, so don't mention that.

I guess to better illustrate, look at the two spheres in the attached image. The effects (one is Iridescence Shaders, the other is just the thin film turned on and IOR turned up to 5, but both demonstrate the problem. Each are just concentric circles that follow the camera and not the light source. I'm wanting to create a shader that instead surrounds or "blooms" from the reflected light. This is an affect that happens naturally, I'm just unable to determine if it's a software limitation because my searches are not leading me anywhere to a solution.

And on another note, is it me or is the reflection of the rainbow iridescent sphere in the white "kind of pearlescent" spehere not a relfection but looks like a cut and paste?

DrunkMonkeyProductions

Could you give a real world equivalent that produces the effect you are asking about?

necroscension

Emerald June beetles, for example. You could fake the look by using a metal flakes layer, but some have more colors in the reflected light(I know, it's both reflected and refracted). Holographic films/foils would be another example, again refracted and reflected light. Shaders like the Anodized and Iridescent shader try to replicate the effect, but they all appear to happen in line with the camera. Also, have you seen cars that are painted to refracted a range of colors instead of the more common 2 colors (i.e. like using metal flakes layer in Iray). Some pearls display blue to pink before becoming whitish/grey after the light's highlight.

Google "pearlescent" and the first result at least for the US should be a car whose paint job is what I'd like to attempt. It goes from teal to blue to purple to a coppery color

I guess what I'm looking for is to be able to apply a gradient instead of a single color for a film, or to assign color values for a reflected/refracted range.

 

OK, looks like this can be done in C4d using FilmIndex and FilmWidth. Example I'm seeing is due to light placement, again colors appearing due to the angle of a light.