I’ve converted the Mastering CGI shader ball (2016) to Maya. It’s a complete Maya scene with lights and shaders (manually converted so not pixel perfect but close enough) so it’s ready to use. If anyone is interested you can contact me (use the Contact Form here on the website or write a comment below). The max version of the shader ball is shared for free on cgtricks (https://cgtricks.com/shader-ball-2016-mastering-cgi/) with the following restrictions: ”You can use the shaderball for personal and commercial use, but you don’t change the base textures or resell the ball. Now, enjoy and share it around.” I assume the same rules would apply here.
All posts tagged mastering vray
Posted:
11 april, 2017Tags:
Vraymagnus olsson
maya
shaders
mastering vray
V-Ray
2016
mastering cgi
shader ball
shader
ball
cgi
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69Mastering CGI shader ball 2016 converted to Maya
Posted:
8 maj, 2016Tags:
Vraymagnus olsson
maya
shaders
remap value
gold
plastic
mastering vray
fresnel
vray attributes
V-Ray
GGX
brdf
OSL
grant warwick
metal
physical
refractive index
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26Creating Mastering V-Ray shaders in Maya: Lesson 02 – Materials 101
A while ago I wrote a blog post called ”Creating Mastering Vray style shaders in Maya”. My goal was to translate some of the techniques Grant Warwick uses in the course Mastering V-Ray in 3ds Max to Maya. A lot of people still contacts me about these techniques and I’ve been feeling more and more bad about how outdated they are. So I thought it was time to update this and show how I would create these shaders today. And with new features like GGX and OSL it’s both faster and simpler to do now!
This post will cover how to create a plastic and a gold shader. Basically what I do is recreate the shaders from Mastering V-Ray: Lesson 02 – Materials 101, but with an updated approach. If this is something that people will find interesting I might continue and cover other Mastering V-Ray lessons in Maya. So please comment or contact me and let me know what you think!
Let’s start with the plastic shader. This is how the node tree looked like with the old setup:
It requiered three different V-Ray materials (with different values for Reflection Glossiness) to be blended together. I’ve also used the RemapValue node as an equivalent to the Falloff node in 3ds Max which is not ideal since it is pretty clumsy. V-Ray 3.3 introduces a Falloff node in Maya with a lot of the same features as in 3ds Max. I’ve only tried it briefly but I was a little bit disappointed by the lack of bezier handles. For this plastic shader I didn’t need any falloff node since I could get the desired result with a simple V-Ray material with GGX as BRDF. Here is the settings I used:
Here is a comparision between the old shader (to the left) and the new (right):
And now on to the gold shader. I’ve used the same approach as with the plastic shader to not blend multiple materials but to rely on a single material with GGX as BRDF. The other big difference is that I use an OSL texture for the reflection instead of using Remap Value nodes. The OSL texture is called Complex Fresnel and you can read more about it here: http://docs.chaosgroup.com/display/OSLShaders/Complex+Fresnel+shader. The way I use this is that I start by browsing to the right material on http://refractiveindex.info/ and simply type in the right values for n and k based on the wavelength (0.650, 0.510, 0.475 for R, G and B). This is how the page looks like:
There is actually a shelf called ”selected data for 3D artists” and that’s a good place to start. However, I found the values for the gold there made it look to reddish, almost like copper. So I tried a few different other Pages and chose the values from the Babar and Weaver 2015 instead.
And this is how the OSL texture looks in Maya:
All of this is better explained here: http://viscorbel.com/vray-materials-part-3-metals/ so I encourage you to read that as well.
This is how the node tree looks like for the gold shader:
The color correction is for purely artistic reasons to tweak the shader to your own liking. In this setup I tried to make the gold look more like the old shader. This Color Correction node is not a default node but can be created from Create – V-Ray – Create from V-Ray plugin – Texture. By multiplying the reflection with a V-Ray Dirt I make the shader slightly less reflective in occluded areas.
This is the final settings for the shader:
And here is a comparision between the old shader (to the left) and the new (right):
As you can see they are not exactly identical but I think they new one is looking better so I didn’t tweak it further to match the old one. Also worth mentioning is the significant dropoff in render time between the old shader and the new.
I have some plans to continue with these blog posts and the next one up would be a Green Metallic Paint shader, which is similar to the one Grant creates in Mastering V-Ray: Lesson 04 – Advanced Material Creation Part 1. But like I said earlier, it depends if someone actually finds this interesting. So please comment and let me know what you think and what you would like to see in the future.
Posted:
23 september, 2014Tags:
Vraymaya
shaders
remap value
gold
plastic
paint
mastering vray
fresnel
Comments:
43Creating Mastering Vray style shaders in Maya
I’m a subscriber of Mastering Vray by Grant Warwick and I’ve been trying to implement some of his techniques in my own shaders. Since Grant is using 3ds Max I’ve been trying to adopt his techniques in Maya. Which is easier said than done sometimes. Mostly because Grant relies heavily on both the Falloff map and Bercon Maps, none of which exist in Maya. Especially the Falloff map is something that bugs me that Maya does not have any equivelent node of. Grant is using the Falloff map to create curves instead of plain numbers for the IOR. IOR values can be found at http://refractiveindex.info/. One way of doing this in Maya is using the Custom Fresnel Script created by TheRenderBlog. You can read more about it here: http://therenderblog.com/custom-fresnel-curves-in-maya-part-2/. This creates a fresnel curve using a Remap Value node. It works great if you want the correct physical values, but is not very easy to modify if you want to tweak the values later. I also used the Remap Value node to create my fresnel curves, and it worked okay but I really missed a Bezier handle which the Falloff map in Max has. First you need to create a Sampler Info and connect the Facing Ratio to a Reverse node. The output of the Reverse goes to the Input Value of the Remap Value node.
Anyway, here is some of the shaders I have created so far:
Plastic
Gold
Green Paint
This is how complex the node tree for the Green Paint shader ended up.
And here is the node tree for the Gold shader.
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