How to create an Alloy? (e.g. 65% Copper+35 % Zinc = Brass)

[delle]

Hi I'm trying to create a good Brass which in vastly used in Architecture.

Following the "Stainless steel material" (introduced by Whaat) I've tryied to blend the two NK file ("cu.nk" and "Zncdte0.nk") but the result was no good What i get is a lighter copper but still a copper....

On the Web there is no sign of a Brass NK file...

Someone has an idea?

Is there a "phisical solution" (in Indigo) to my problem or I have to "fake" the brass material?

Bye

[OnoSendai]

Well, there's a blend, as you said, apart from that there's no current solution apart from trying to pick the specular reflectivity colour yourself.

[psor]

@delle

I recommend to use rgb2nk kindly provided by tinman, developer of renderlight. You'll enjoy it for sure!




GUI of the little yet powerful program.





And don't tell me it's like faking, just use it and stop thinking about it.
For the sake of it I'll attach two zipped .nk files as example. Enjoy!

Just a quick example feel free to create your own.

brass_(light+dark)_EXAMPLE_by_psor.jpg (120.97 KiB) Viewed 8813 times

brass_(light+dark)_EXAMPLE_by_psor.nk.zip

brass (light+dark)

(705 Bytes) Downloaded 440 times

take care
psor

[Borgleader]

that is pretty fecking cool

[pixie]

I wonder if Specular Reflectivity could be used to achieve the same affect

[psor]

I wonder if Specular Reflectivity could be used to achieve the same affect

Of course it is!






take care
psor

[delle]

This is what I've got adding some gold to the "alloy".

This Material has 25% of gold inside (in effect it is a little bit expensive as brass )

EDIT Material composition: 25% Gold, 50% Copper and 25 % Zinc

Code: Select all

<material>
    <name>Material_11_ALLOY1_LAYER0</name>
    <phong>
      <nk_data>nkdata\cu.nk</nk_data>
      <exponent><constant>200</constant></exponent>
    </phong>
  </material>
  <material>
    <name>Material_11_ALLOY1_LAYER1</name>
    <phong>
      <nk_data>nkdata\Zncdte0.nk</nk_data>
      <exponent><constant>200</constant></exponent>
    </phong>
  </material>
  <material>
    <name>Material_11_ALLOY1</name>
    <blend>
      <a_name>Material_11_ALLOY1_LAYER0</a_name>
      <b_name>Material_11_ALLOY1_LAYER1</b_name>
      <blend>
        <constant>0.333333</constant>
      </blend>
      <step_blend>false</step_blend>
    </blend>
  </material>
  <material>
    <name>Material_11_LAYER2</name>
    <phong>
      <nk_data>nkdata\au.nk</nk_data>
      <exponent><constant>200</constant></exponent>
    </phong>
  </material>
  <material>
    <name>previewmaterial</name>
    <blend>
      <a_name>Material_11_ALLOY1</a_name>
      <b_name>Material_11_LAYER2</b_name>
      <blend>
        <constant>0.250000</constant>
      </blend>
      <step_blend>false</step_blend>
    </blend>
  </material>

[delle]

I've changed a little bit the composition of the Alloy, now it is:

Gold 25%, Copper 63%, Zinc 12%

[Doug Armand]

I've changed a little bit the composition of the Alloy, now it is:

Gold 25%, Copper 63%, Zinc 12%

Thats looking really good.

I've been playing around with similar combo. This is my latest. It really depends on quite what kind of brass effect your after as it can vary a lot.

its a mix of mix of Copper,Zinc,ChromiumSilicide and Gold to try and achieve a light brass material


btw for those interested its been uploaded and is called 'Brass_uing_Copper_Zinc_ChromiumSilicide_Gold'

[delle]

New Values:

Gold 18%, Copper 70% and Zinc 12%

[Doug Armand]

Nice work. I think yours is the more 'brassy'

[delle]

Nice work. I think yours is the more 'brassy'

Thank you Doug, I'm doing some new test in order to get different brass flavors (e.g. Red brass).

Stay tuned...

[Doug Armand]

Nice work. I think yours is the more 'brassy'

Thank you Doug, I'm doing some new test in order to get different brass flavors (e.g. Red brass).

Stay tuned...

Cool - don't forget to upload them to the Material database

[delle]

Nice work. I think yours is the more 'brassy'

Thank you Doug, I'm doing some new test in order to get different brass flavors (e.g. Red brass).

Stay tuned...

Cool - don't forget to upload them to the Material database

Done

[delle]

New Test: Gold 5%, Copper 62%, Zinc 33%