Thin film OSL shader

[vlado]

Nice! I'm glad this came in useful

Best regards,
Vlado

[Joelaff]

We used this thin film map just yesterday to add extra realism to a CU of an old plaster type picture frame. The frame is the really ornate type, painted gold. Took a pretty complex shader flow graph to get it to look the way I wanted it. The thin film was used in screen mode on top of the reflection channel of the base layer (in a composite map). Then we VRayBlended some VRayFlakes on top, which turned out great. Client was blown away by the subtle color variations.

So, thanks, Vlado!

[^Lele^]

seconds.
The effect of the shader itself on rendertime is negligible, and so quick i'd call it invariant from test to test.

[jonnybefree]

nice tests lele. wonder the differents in rendertimes from start to end?

[Vizioen]

Holy sh...everytime I think I've seen everything something new comes up. So the only way to achieve this effect is to use this OSL shader? It would be indeed a great addition to the VrayMTL, and ignore clutter, the more buttons the better .

[bigbossfr]

I have this error in Maya : OSL shader error: Could not compile shader C:/Users/damien.SDC/Downloads/thinfilm/irridescence.osl (OSL to OSO)
?

[^Lele^]

[^Lele^]

[^Lele^]

for all the samples: black diffuse, map in the reflection slot, GTR BRDF, 0.55 RGlossiness.
The dome is black and white, so all the colours are from the map.
Map parameters (fixed across the samples):
min thickness: 200
max thickness: 666
rest as default.
Changing, by 0.05 increments is the IoR, from 1.15 to 1.65 in the last example (next post)

[vlado]

I think the best way to tackle this is the same approach you took with the settings. Have all the basics on show by default, but have an advanced check box that displays additional settings that let "power users" tweak what they need to. I appreciate VRay is used by everyone from absolute amateurs through to VFX pro's and that catering to everybody's needs is very difficult but it seems a bit backwards to withhold updated elements of the software to cater for the few that it might scare.

Well I'm not withholding it, there's still a way to get what you want obviously Like I said, will think about it. You are right that if we hide some of the existing params in an advanced view, there will be space for new stuff.

Best regards,
Vlado

[Macker]

It could be added to the VRayMtl for sure, but I've been accused that the UI is incredibly cluttered already. Will think about it anyways.

For the wavelengths yes, they need to be more or less realistic.

Best regards,
Vlado

I think the best way to tackle this is the same approach you took with the settings. Have all the basics on show by default, but have an advanced check box that displays additional settings that let "power users" tweak what they need to. I appreciate VRay is used by everyone from absolute amateurs through to VFX pro's and that catering to everybody's needs is very difficult but it seems a bit backwards to withhold updated elements of the software to cater for the few that it might scare.

[Art48]

Cluttered UI in the VRayMaterial? Oh, come on, I mean maybe there is much stuff to do but this is professional software. People shouldn't be afraid when they see some buttons... Jeez...

I'd rather see a cluttered UI than holding back useful features. You shoul dpropably tidy up the UI in 3.2 or even 4.0 with a total overhaul, if required. But until then I see no point in holding back stuff because of cluttering...

[vlado]

It could be added to the VRayMtl for sure, but I've been accused that the UI is incredibly cluttered already. Will think about it anyways.

For the wavelengths yes, they need to be more or less realistic.

Best regards,
Vlado

[Macker]

Could this be incorporated into the standard VRay Material (maybe under an "advanced" tab)? It's a superb addition.

Also, I assume that to keep realistic you would use realistic wavelengths - 380 to 750 nm?

[3LP]

Niiiiiicee!

Stan