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