Vanta Black-esque effect?

Zambrah · Jan 2019

I'm looking to get the portals-pictured-below's black to just be completely flat and unreactive to any sort of light in the Marmoset scene.

https://imgur.com/d6M8YEg

Its got a Normal/Rough/Metal/Albedo map, and the Rough/Metal is set to max roughness and min metalness, but to be honest I'm not sure if theres another map I should make to achieve this effect for the portals, or if its something I should try and figure out in Marmoset specifically?

Help would be greatly appreciated!

Revel · Jan 2019

Haven't tried it myself but what if you make your normal map blue channel to be black? basically inverting the depth normal direction?

Zambrah · Jan 2019

Just gave it at try, and it doesn't give it that non-light-reactive quality unfortunately,

Zambrah · Jan 2019

doublepost

JedTheKrampus · Jan 2019

Vantablack has very low diffuse AND specular response that's outside of the realm of ordinary materials. Easiest way to achieve the effect is to make a material with unlit diffusion, albedo color set to black, and reflection set to None, but then you won't be able to make use of your textures elsewhere on the model. The alternative way to achieve this effect is to use Adv. Metalness for the Reflectivity then set up a specular level map. The areas you want to be super-black you will need to set to black in the Specular Level Map. Ordinary areas should be 128/128/128 grey. And those super-black areas must be at 0% gloss, or 100% roughness, or they will have a specular response around the edges.

Here's a screenshot with the things you need to make sure are set correctly for it to work. The good news is that you're most of the way there already.

Image: https://us.v-cdn.net/5021068/uploads/editor/og/8xcyxjxyfmxk.jpg

Zambrah · Jan 2019

Thank you! I'm going to give this a shot tomorrow! I'll report back with results soon!

Zambrah · Jan 2019

The Adv. Metal Spec map worked wonders! I really appreciate the assistance!

https://imgur.com/9BLhV2Z

Mink · Jan 2019

I've always found metalness 0, roughness 1, and Specular level 0 to do the trick.

Vanta Black-esque effect?

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