Can't get metalness to work

[snowPu]

I have the following material

material Material2
{
    technique
    {
        pass
        {
        specular 1.0 1.0 1.0 1.0 200.0
        rtshader_system
        {
           lighting_stage metal_roughness
        }
        diffuse 0.2 0.2 0.2 1.0
        }
    }
}

auto baseMaterial = Ogre::MaterialManager::getSingleton().getByName("Material2", nameOfResourceGroup);
entity->setMaterial(baseMaterial);

I know that the material gets loaded properly as the diffuse property works. However I can't see any change in appearance with the metal roughness properties.

I have a directional light in the scene created by the following code:

Ogre::Light* light = sceneManager->createLight("MainLight");
    light->setCastShadows(true);
    light->setType(Ogre::Light::LT_DIRECTIONAL);
    light->setDiffuseColour(Ogre::ColourValue::White);
    Ogre::SceneNode* lightNode = this->cameraNode_->createChildSceneNode();
    lightNode->attachObject(light);

[paroj]

did you see the parameter mapping of specular here: https://ogrecave.github.io/ogre/api/latest/rtss.html#autotoc_md255 ?

as you set roughness=1.0, your material should be just slightly darker compared to blinn phong.

Also verify that the RTSS is active for your viewport (in case you are on D3D9 or GL1)

[snowPu]

1. What should I check for in parameter mapping exactly? This is what it says:
   By default, roughness is read from specular[0] and metalness from specular[1].

2. Also verify that the RTSS is active for your viewport (in case you are on D3D9 or GL1) --
   how do I check this?

3. I wanted to post this ogre forum but my gmail id isn't being accepted for registration. I keep getting this:

verification mail delivery to gmail currently broken
The solution you provided was incorrect

[paroj]

What should I check for in parameter mapping exactly?

your specular[0] and specular[1] values, which are both 1.0 as you posted above

how do I check this?

you should a snippet like this in your code:

ogre/Samples/Simple/include/PBR.h

Lines 42 to 43 in 2b1864e

	// Make this viewport work with shader generator
	mViewport->setMaterialScheme(MSN_SHADERGEN);

I wanted to post this ogre forum but my gmail id isn't being accepted for registration. I keep getting this:

gmail just does not work. we are aware of this #2924

[snowPu]

Unfotunately it still doesn't work :( Should I be looking out for something else?

[paroj]

does it work if you modify one of the materials used in the PBR sample that is referenced above?

[snowPu]

So it works for me now.
What I was doing earlier:

material Electrode
{
    technique
    {
        pass
        {
        specular 0.5 0.5 0.2 64
        rtshader_system
        {
           lighting_stage metal_roughness
        }
        diffuse 0.7 0.7 0.7 1.0
        }
    }
}

auto mat = Ogre::MaterialManager::getSingleton().getByName("Electrode", ogreResources::RESOURCE_GROUP)->clone(newMatName);
mat->setDiffuse(this->definition_.display.color);
entity->setMaterial(mat)

I was doing this so that I can set the metallic properties for all electrodes in my scene, but set the diffuse properties per electrode type. So I create a clone and set diffuse properties for the cloned material.

Somehow this doesn't work to set metal properties of the material.

If I do this, however,

auto mat = Ogre::MaterialManager::getSingleton().getByName("Electrode", ogreResources::RESOURCE_GROUP);
entity->setMaterial(mat)

so not use a clone, but the original material, it works.

Do you know why?

[paroj]

you must explicitly clone the RTSS parts, see:

ogre/Tests/VisualTests/PlayPen/src/PlayPenTests.cpp

Lines 6977 to 6981 in 4acf489

	auto mat =
	baseMat->clone(StringUtil::format("Examples/PBR_Sphere%d", idx), String(TRANSIENT_RESOURCE_GROUP));
	#ifdef OGRE_BUILD_COMPONENT_RTSHADERSYSTEM
	RTShader::ShaderGenerator::getSingleton().cloneShaderBasedTechniques(*baseMat, *mat);
	#endif