Thank you people. I wast just being a little stupid. This was the code that I was using:<br><br> //From Cone4.cc<br> vtkActor *coneActor2 = vtkActor::New();
<br> coneActor2->SetMapper(coneMapper);
<br> coneActor2->GetProperty()->SetColor(0.2, 0.63, 0.79);<br> <span style="color: rgb(51, 0, 153);">coneActor2->GetProperty()->SetOpacity( 0.1f);</span>
<br> <span style="color: rgb(255, 204, 0);">coneActor2->SetProperty(property);</span>
<br> coneActor2->SetPosition(0, 10, 0);<br><br>After setting the opacity I was using setting the old property :S.<br><br>Thanks<br>