Coating material thread

[OnoSendai]

This thread is for information, questions about, and renders of the new coating material.

[Whaat]

This thread is for information, questions about, and renders of the new coating material.

How about XML for the coating material and the double-side material?

[OnoSendai]

Coating XML:

Code: Select all

<material>
    <name>default</name>

    <coating>
      <ior>1.5</ior>
      <substrate_material_uid>1000</substrate_material_uid>

      <exponent>
        <constant>
          10000
        </constant>
      </exponent>

      <thickness>
        <shader>
          <shader>
            <![CDATA[
            def thickness_um() real : 3.0 + 6.0 * fbm(
              getTexCoords(0) + 
                vec2(
                  fbm(getTexCoords(0) * 40.0, 3), 
                  fbm(getTexCoords(0) * 50.0, 3)
                 ) * 0.1
               ,
               1)
            
						def eval(vec3 pos) real :
							0.000001 * thickness_um()
							
						]]>
          </shader>
        </shader>
      </thickness>
    </coating>
  </material>

By the way you can always see the XML by saving out an IGM material and checking that out

[Whaat]

By the way you can always see the XML by saving out an IGM material and checking that out

But I need to know NOW!! I'm at work and away from my Indigo...

Thx ono

[OnoSendai]

By the way you can always see the XML by saving out an IGM material and checking that out

But I need to know NOW!! I'm at work and away from my Indigo...

Thx ono

Ha ok

[FakeShamus]

Hi Ono,
is there an alternate way to define the substrate material, other than referencing the material_uid? could material name be used instead (sort of like you would do for a blend material - defining the substrate material first and then using it within the coated material definition)? as it is you can't save a material and then re-use it later.

[CTZn]

Hi FakeShamus,

Some of the new features coming with 3.6 beta are not finalized yet, please check out Ono's answer to suvakas on the matter:

http://www.indigorenderer.com/forum/vie ... 18#p119118

[FakeShamus]

ah, I see.
thanks

[OnoSendai]

Hi Ono,
is there an alternate way to define the substrate material, other than referencing the material_uid? could material name be used instead (sort of like you would do for a blend material - defining the substrate material first and then using it within the coated material definition)? as it is you can't save a material and then re-use it later.

Hi FakeShamus,
We're generally moving towards a UID based approach, instead of binding by name.

[suvakas]

Is there any info available about the UID ?
Like how to use it inside Indigo mesh?

Suv

[OnoSendai]

Is there any info available about the UID ?
Like how to use it inside Indigo mesh?

Suv

Hi Suv,
UIDs just have to be different (unique) for every node in the scene.

The material UIDs are not stored in the mesh - they are stored in the model2 element in the scene XML. Try serialising a scene with the Indigo GUI (saving a scene) and check out the model2 XML.

nick

[suvakas]

Hey Nick,

Ok, good idea. Will do so.
But wasn't there a list of used materials also inside igmesh file?

Suv

[OnoSendai]

Hey Nick,

Ok, good idea. Will do so.
But wasn't there a list of used materials also inside igmesh file?

Suv

Yeah, there used to be a list of material names inside the igmesh file. But it was a bad idea to store the material names in the mesh

[StompinTom]

When using a texture to control coating thickness, the input field could use a couple more decimal places! It's not possible to enter 0.0000001, for example... Perhaps a multiplier?

[OnoSendai]

When using a texture to control coating thickness, the input field could use a couple more decimal places! It's not possible to enter 0.0000001, for example... Perhaps a multiplier?

It's in micrometres, you don't need a value that small

EDIT: Ah, the texture scale (b) control is in metres.