Thin film OSL shader

[pg1]

Seems to broken on 2015?

I get this error
In the material compiler output
Could not compile shader J:\Jobs\46761M_Mazda2Headlight_CP\3d\Projects\Maps \irridescence.osl (OSL to OSO)

[Joelaff]

Cool, Lele!

[^Lele^]

And a slightly tweaked, less pronounced, shader (chiefly, i changed each layer's influence, and the flakes' normals orientation variance).



A word of notice: you WILL need many AA Rays AND a reconstructive filter on the rendered image to make sure the flakes won't shimmer in an animation.
This is a need forced by the fact that the flakes map does no filtering on its own, so we have to burden VRay with it.
This last one was rendered with a fixed-12 and a sharp quadratic filter.

EDIT: made a mistake earlier. Corrected now, max 2014 scene added, along with the flakes OSL shader with descriptions for each spinner.

OSL_carPaint_with_iridescence_B.zip

[^Lele^]

A particular use of the iridescence shader, coupled with a flakes normal texture, in a blend material, to generate a carpaint with iridescent flakes.
Scene and shaders are attached, just grab yourself an HDRI in place of mine.



OSL_carPaint_with_iridescence.zip

[Fredrik Averpil]

By the way - I totally missed this just because you're posting this in a max sub-forum. God knows how much goodies I've missed because of this (being a Maya user) ...

[Fredrik Averpil]

Wow!

Simon, who sits next to me in our office saw this and downloaded, gave it a test run ... and wow, just wow!
Thanks so much for sharing!

[^Lele^]

lol! yeas, that'd make sense!
You can wire me a few hundred bucks at your own leisure

[Morbid Angel]

makes sense...that's why I had to crank the shader fresnel! I'll correct it tomorrow.

[^Lele^]

that's how it ought to be used.
Make sure you turn fresnel off, as it's got its own one!

[Morbid Angel]

nvm got it to work, but only as osl texture in reflection map mode.

[Joelaff]

Looking nice!

In the past we would achieve somewhat similar results with Tri planar falloff maps of different colors. More artist control, I guess, but more of a pain, and not accurate (though I don't know how accurate this is after you tweak it).

LightWave has had a thin film shader for twenty years, and it was fun to play with. This one is much easier to use in production.

[zeronove]

I would like to test this OSL shader but it crashes max 2011 every time I try to load it! ...any idea? ...is it supposed to work with older releases?
PS the same happens with the other OSL (AFMFresnel)

[R2J2]

I desaturated and played with the hue a bit so I'm not sure how accurate this is but it's an awesome shader.

[Joelaff]

Ah, good idea on the screen mode composite map. It's still magic to me how this works :P

I dunno if that is the ideal way to use it, but it worked nicely for my purpose, and renders faster than a whole second material with a blend. My surface is already slow enough with VRayFlakes as a second material blended

[Art48]

Ah, good idea on the screen mode composite map. It's still magic to me how this works :P