Metal Shader work flow

littleclaude · Apr 2016

Metal Shader work flow. I saw this post by Jarrod Hasenjager and thought I would share it with you guys, hope it helps.

Inside the following link there are loads of metal swatches, as you can see in the example below, enjoy.
https://www.artstation.com/artwork/aL4JR

Image: https://cdn2.artstation.com/p/assets/images/images/002/354/226/large/jarrod-hasenjager-shaderdev-brass-outdoor-v01.jpg?1460664742

Image: https://cdn1.artstation.com/p/assets/images/images/002/354/329/large/jarrod-hasenjager-shaderdev-iron-studio-v01.jpg?1460665454

EarthQuake · Apr 2016

While these renders look nice, I would caution anyone using these as reference material for texture values in games. He appears to be using both an IOR and a specular intensity value, essentially setting the reflectivity twice. So copying the spec values into your textures and putting them in a game engine probably won't work well. For instance, his rust materials have a spec intensity of 60%, which should be about 4% instead in a standard pbr specular workflow shader.

almighty_gir · Apr 2016

Joe, i think this is set up for Arnold renderer, which does a stupid thing where IOR is for dielectrics and specular is for metals.

pre-rendered tech is dumb. lol.

Neox · Apr 2016

good that there is this info about fresnel thats always yes

so which material would not use fresnel?

EarthQuake · Apr 2016

0xffff · Apr 2016

Neox said:

good that there is this info about fresnel thats always yes

so which material would not use fresnel?

Because everything has fresnel

almighty_gir · Apr 2016

Neox said:

good that there is this info about fresnel thats always yes

so which material would not use fresnel?

https://www.youtube.com/watch?v=FhRiDsmZMag

NNKD · Apr 2016

Everything has fresnel!

"It was theoretically predicted that Vertically Aligned carbon NanoTube Array (VANTA) coatings should have an extremely low index of refraction implying Fresnel reflection from such materials will be low. The combination of low Fresnel reflection with the strongly-absorbing behaviour of a highly-percolated structure suggests the reflectance of VANTA coatings will be extremely low."
https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-22-6-7290&id=282123

Metal Shader work flow

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