My quick take on it over lunch. Kinda meh. Hard to get those bright spots to really pop without killing the rest of the spec. Edit: Some tweaks: http://i.imgur.com/z7TV01n.jpg (MAPS) (Used Emissive to make the speckles really pop)
Thanks Pedro, good Idea as usual... I lol'd so freaking Hard @ DEElekgolo Nice reference. Looking at some SSS materials and how to cheat them without shader manipulation, I'll post some references when I find a good one...
so gave this a shot this weekend, mostly failed. closest I could get was this hard to see it in a still but the sparklies do look colored unless the specular focus is right on them. spec map is monochrome, but it needs to have reflection/environment map to disguise the color spec thats baked into the diffuse.
That's the thing. For example, this dude makes a MOP material in vray http://viscorbel.com/creating-mother-of-pearl-material-with-vray/ But he uses like a mix of 3 materials blended together, which all use anisotropic spec and each has a diferent rotation angle and colored spec, so, its a bit hard to do something like this.
Damn... had high hopes for seeing some cool stuff in this thread. Without colored spec it's going to be pretty hard to re-create the look of the sample. you might be able to get an all white MOP effect with anistropic lighting and a well made aniso-direction map. That seems even more exotic than colored spec though.
The main defining characteristic for this type of material is the color variation in the specular reflections. Ideally you would even want to use a two-layered specular component, like you would for a car shader, to pull off the effect. Simple greyscale makes the look very hard to pull off, you've gotta "bake" the color…
here's a fun one... Any ideas? metallic gold cord/rope and metallic gold coatings. It's confusing to me because metals have no diffuse light, it's purely reflection color because the surface is so dense/hard. But these kinds of materials are usually very soft. If anyone has any ideas on how this should be done in a…