title: Matlab 3d volume visualization and 3d overlay
body: <p>The question is pretty much the title.</p>
  
  <p>I have a 3d volume loaded as raw data <code>[256, 256, 256] = size(A)</code>. It contains only values of zero's and ones, where the 1's represent the structure and 0's the "air".</p>
  
  <p>I want to visualize the structure in MATLAB and then run an algorithm on it and put an overlay on it, let's say in the color red. </p>
  
  <p>So to be more precise:</p>
  
  <ol>
  <li>How do i visualize the 3d volume. 0's transparent, 1's semitransparent?</li>
  <li>Plot a line in the 3d visualization as an overlay?</li>
  </ol>
  
  <p>I already read the MathWorks tutorials and they didn't help. 
  I tried using the <code>set</code> command, but it fails completely saying for every property I try "invalid root property".</p>