chrome surface

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

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archonforest

Quote from: Kadri on December 18, 2016, 04:40:29 PM

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.

Tku Kadri. Sounds like a good idea. Checking it now...ops...render time went up to huhhh...way up...well if more calculation happening in theory I might get better results....
I guess I just leave the pc alone to digest it and will report back later. :)
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

AP

Quote from: Dune on December 19, 2016, 02:25:36 AM
How do you mean that? Chrome is like a mirror, isn't it?

In many ways yes, however there are subtle differences to each surface. It is difficult to explain but it is the way light interacts with those surfaces. Also, I think a mirror has a stronger reflectance then chrome.


Hannes

Quote from: AP on December 19, 2016, 03:37:15 AM
In many ways yes, however there are subtle differences to each surface. It is difficult to explain but it is the way light interacts with those surfaces. Also, I think a mirror has a stronger reflectance then chrome.

Maybe you mean, chrome surfaces should have some more imperfections? You could add a very subtle displacement or merge the chrome shader with something else like rust or another chrome shader that is less reflective.

AP

#18
Also a mirror has a dielectric surface where as chrome has a metallic surface.

archonforest

Quote from: Hannes on December 18, 2016, 04:43:06 PM
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?!

I went up to 3 with the multiplier but the reflection still jagged a lot. What Kadri suggested definitely makes the different but render times goes from 2 min up to 27 :D
Guess this is the price I will have to pay :D
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

René

360 Degree detail works fine(Thanks Kadri)

You could play with the reflectivity and reflection tint settings. If you lower reflectivity to 0.5 and increase reflection tint to 40 you will get a lot more reflection without deviated colors, although atmospheric depth will look wrong.
Self reflection will be coarser with each repetition.
I think you will need a fresnel shader to make it look perfect, but i don't know if this is possible in TG.

archonforest

Thx Rene :)
Nice reflections there! What I try to do is not a real chrome(metal) looking ball but the quality of a chrome reflection. The balls are all colored. I will upload the reference render to show what I am trying to achieve in TG. When I saw this render first I thought I can do this easy in TG...not a big deal...hehe...no I can see it is not that easy... :)
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

René

You can pick any color you like in the  reflection color tab(A) Next you enter '40' (B) and the color box may turn white, but that won't affect the way the color renders.

René

#23
Great for making Christmas balls. Is that what you're after? ;)

archonforest

Quote from: René on December 19, 2016, 11:54:34 AM
Great for making Christmas balls. Is that what you're after? ;)
No not for xmas balls. Just want to re-create that picture I uploaded before. It was done with V-Ray and I want to see if its possible in TG.
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

Hannes

Did I get you right, you're looking for a way to create a shader like in your last image? These billiard balls?

archonforest

Quote from: Hannes on December 19, 2016, 02:32:45 PM
Did I get you right, you're looking for a way to create a shader like in your last image? These billiard balls?

Yes, I want to create that insanely shiny surface. Then the rest of the image. Blur lights...etc...
I already got a pretty good surface but if u have an idea it will be welcomed big time :)
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

Hannes


archonforest

Quote from: Hannes on December 19, 2016, 04:04:31 PM
I'm working on it...
Yipee!
Me too...I got some nice shinny surface by now but there is a ball that is grey and that one is not reflecting anything... >:(  but on the ref picture the gray/white ball have a nice reflection too....hmm. Eagerly waiting to see your set up. :)
Dell T5500 with Dual Hexa Xeon CPU 3Ghz, 32Gb ram, GTX 1080
Amiga 1200 8Mb ram, 8Gb ssd

AP

Quote from: René on December 19, 2016, 11:04:37 AM
360 Degree detail works fine(Thanks Kadri)

You could play with the reflectivity and reflection tint settings. If you lower reflectivity to 0.5 and increase reflection tint to 40 you will get a lot more reflection without deviated colors, although atmospheric depth will look wrong.
Self reflection will be coarser with each repetition.
I think you will need a fresnel shader to make it look perfect, but i don't know if this is possible in TG.

It would be nice to effect the fresnel in various ways like more in-depth renders out there. Those results look similar to what I was working but I could never make it look chrome-like enough.