QMaterial *material1 = new QMaterial();
QMaterial *material2 = new QMaterial();

// Create effect, technique, render pass and shader
QEffect *effect = new QEffect();
QTechnique *gl3Technique = new QTechnique();
QRenderPass *gl3Pass = new QRenderPass();
QShaderProgram *glShader = new QShaderProgram();

// Set the shader on the render pass
gl3Pass->setShaderProgram(glShader);

// Add the pass to the technique
gl3Technique->addRenderPass(gl3Pass);

// Set the targeted GL version for the technique
gl3Technique->graphicsApiFilter()->setApi(QGraphicsApiFilter::OpenGL);
gl3Technique->graphicsApiFilter()->setMajorVersion(3);
gl3Technique->graphicsApiFilter()->setMinorVersion(1);
gl3Technique->graphicsApiFilter()->setProfile(QGraphicsApiFilter::CoreProfile);

// Add the technique to the effect
effect->addTechnique(gl3Technique);

// Set the effect on the materials
material1->setEffect(effect);
material2->setEffect(effect);

// Set different parameters on the materials
const QString parameterName = QStringLiteral("color");
material1->addParameter(new QParameter(parameterName, QColor::fromRgbF(0.0f, 1.0f, 0.0f, 1.0f);
material2->addParameter(new QParameter(parameterName, QColor::fromRgbF(1.0f, 1.0f, 1.0f, 1.0f);