V-Ray 3.0 For 3ds Max Updates

[RobH22]

I also can't seem to locate the new 3.0 Update from the Newsletter today. The last one I can access is from May.

[Bruce Hart]

Ehem, what is GGX? When I google it I get Gold's Gym and some other stuff that seems unrelated.

Just Google "GGX Shader". I can only see 3.00.07 in he download also

[RobH22]

GGX is a shader model that has some advantages over Phong and Blinn. It's great for reflections. It facilitates getting that hard specular surrounded with a diffuse falloff haze around it, among other things.

[Svetlozar Draganov]

Hello guys,

I can see that a lot of you had different kind of issues with our website: slow speed / faulty errors / missing builds and etc.
That might be due to server overloading - would you please try to access and download the new version again and let us know if you have any issues like extremely slow speed and etc?

Thank you very much in advance.

[RobH22]

Hi Svetlozar,

On my end there is no file available in Firefox, Chrome or IE. I cleared my cache and in all of them I get the following:

[Syclone1]

I got the new update with no problem other than it was a little slow but figured it was just getting overloaded...

[Svetlozar Draganov]

Hi Svetlozar,

On my end there is no file available in Firefox, Chrome or IE. I cleared my cache and in all of them I get the following:

[ATTACH=CONFIG]21151[/ATTACH]

There are some issues with the demo version - it will be available for download in the next few hours.

[Joelaff]

In the latest dailies for 3ds Max VRay I still can't fin the GGX BDRF... Is that limited to Maya right now? Maya-Shmaya... they should always get things after Max

[vlado]

The GGX BRDF is a feature of the upcoming service pack of V-Ray for 3ds Max.

Best regards,
Vlado

[Joelaff]

Cool. Thanks for clarifying, Vlado.

[Pixelcon]

Is there an ETA on the service pack?

The GGX BRDF is a feature of the upcoming service pack of V-Ray for 3ds Max.

Best regards,
Vlado

[vlado]

It's final touches now, so hopefully towards the end of the month.

Best regards,
Vlado

[^Lele^]

GGX is a shader model that has some advantages over Phong and Blinn. It's great for reflections. It facilitates getting that hard specular surrounded with a diffuse falloff haze around it, among other things.

The hotspot-to-tail ratio is now fully configurable within the bounds of the GTR (Generalized-Trowbridge-Reitz) BRDF, with an added parameter called "Gamma" (nothing to do with the LWF gamma.).
When gamma is at 2.0, the special-case model is called GGX (or just TR, without the "Generalized" keyword), while with gamma at 10, the behaviour is extremely close to the Beckmann model.

Notice the gtr gamma is doing exceedingly pretty things with and without fresnel active, and at very small increments of gamma/gloss around some key values, spread around the whole BRDF domain.
In early tests i was using it as a diffuse base, to give you an idea of just how powerful the model is, particularly considering back then gamma was fixed at 2.0.

Here's a test render from Vlado. (Hey, you posted it on G+, man! :P )
http://help.chaosgroup.com/vray/imag...tr_render.html

and a link to the chief paper in matters of BRDFs at this moment in time, from Disney, from which pretty much everyone is drawing inspiration or straight-out code (see fig.18 for the BRDFs gamma comparison.)

https://disney-animation.s3.amazonaw...f_notes_v2.pdf

[Vizioen]

The hotspot-to-tail ratio is now fully configurable within the bounds of the GTR (Generalized-Trowbridge-Reitz) BRDF, with an added parameter called "Gamma" (nothing to do with the LWF gamma.).
When gamma is at 2.0, the special-case model is called GGX (or just TR, without the "Generalized" keyword), while with gamma at 10, the behaviour is extremely close to the Beckmann model.

Notice the gtr gamma is doing exceedingly pretty things with and without fresnel active, and at very small increments of gamma/gloss around some key values, spread around the whole BRDF domain.
In early tests i was using it as a diffuse base, to give you an idea of just how powerful the model is, particularly considering back then gamma was fixed at 2.0.

Here's a test render from Vlado. (Hey, you posted it on G+, man! :P )
http://help.chaosgroup.com/vray/imag...tr_render.html

and a link to the chief paper in matters of BRDFs at this moment in time, from Disney, from which pretty much everyone is drawing inspiration or straight-out code (see fig.18 for the BRDFs gamma comparison.)

https://disney-animation.s3.amazonaw...f_notes_v2.pdf

In other words it's not just GGX, it's even better? Will this be VRay RT compatible?

[^Lele^]

With proper permission:

The image is a three-layer blend material with three reflective-only materials (diffuse is black).
The only change between them is GTR glossiness and "GTR tail falloff" (As the gamma parameter has been relabelled for the UI).
The diffuse and specular layers have an Ior of 4.0, while the sheen layer has an Ior of 3.0.
In order, RGB, Sheen (0.35 gloss, extra-low gamma at 0.05) , Diffuse (0.05 Gloss, Beckmann-level Gamma of 10.0), and Specular (0.65 gloss, GGX Gamma of 2) .



So, while we are not quite AT the principled brdf mixer Disney (and PRMan 19) have, we have most of the tools to build our own well in place. ^^