chrome surface

Started by archonforest, December 17, 2016, 02:36:10 PM

Previous topic - Next topic

archonforest

Searched the forum but no real luck thus I ask here. What is the best way to create a surface that reflects like chrome?
I am playing with the reflection shader since a while but nothing similar comes as a chrome.

Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd


archonforest

Thx Kadri. I looked at this one today but did not seemed a real chrome surface....well I will download the sample to see it in TG.
Tku again :)
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

Kadri


There were-are others. Marc shared some too. But on Ashunder unfortunately.

archonforest

Yeah got it.
I saw a v-ray render of some balls and first I thought it is not a big deal and I can do this in TG but it looks like harder than i thought. Anyway I will still try to reproduce that image... :D
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

Hannes

#5
Just use a totally black surface layer and add a reflective shader as a child layer with "index of refraction" set to 3.

EDIT: you don't need the black surface layer if you want nothing but the chrome. Just connect the reflective shader with the object's surface shader input,

archonforest

Quote from: Hannes on December 18, 2016, 11:01:01 AM
Just use a totally black surface layer and add a reflective shader as a child layer with "index of refraction" set to 3.

EDIT: you don't need the black surface layer if you want nothing but the chrome. Just connect the reflective shader with the object's surface shader input,

Thank you for the tip.  :)
Is there a way make the specular highligh sharper? Right now it is blurry and seem like no changes I tried so far makes a visible different on it. Like on a very polished reflective ball the highlight would be pretty sharp.
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

j meyer

It should be sufficient to set specular roughness to something like 0.05 or even less
to achieve this.

archonforest

Quote from: j meyer on December 18, 2016, 02:01:37 PM
It should be sufficient to set specular roughness to something like 0.05 or even less
to achieve this.

Thx! 0.015 did the trick. :)

Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

fleetwood

#9
I find using a refractive index like 9.0 gives a more metallic effect, regardless of the true refractive index of chromium.
examples of refractive index 3.0 and 9.0 on black color surface roughness 0.02

archonforest

Thx Fleetwood.  ;)

My next problem to solve is the reflection of the nearby ball on the main ball. The reflection is a bit jagged. Playing with the render subdiv settings. Getting a bit smoother reflection but I want to kill all jagged parts. There is an AA section under Render Pixel Sampler. Does anybody played with that?
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

Kadri


Not sure about the other options but i think you might have to use the "360 degree detail"
(Render node+Advanced tab+Ray detail region) option too i think.

Hannes

As far as I remember you need to increase the ray detail multiplier (render subdivision settings) to 1 to get correct reflections. I don't know, if Kadri's tip works kind of similar?!

AP

I often wonder if there is a way to differentiate the chrome from looking like a mirror surface. Glassy verses metallic.

Dune

How do you mean that? Chrome is like a mirror, isn't it?