title: plot3d - how to change box color and remove axis ticks
body: <p>I'm trying to make some visual modifications to the default plot3d object. Specifically i would like to put a light box color as a background (only in the box, not the whole palette) and remove the axis tick marks (the x,y,z values on the axis are distracting). I have spent countless hours googling what options to change, but I cannot for the life of me figure this out. Any help would be super appreciated.</p>
  
  <p>I whittled down my code to the following, so that you can re-produce it.</p>
  
  <pre><code>library(rgl)
  
  xvar &lt;- c(0.23158792, 0.09686823, -0.58937138, -1.04380419,0.52169760, 1.15218492, 1.36873947,
        -0.91592078, -0.66918513, -0.15279666)
  yvar &lt;- c(-1.06993703, 1.51913070 , 1.45069457, -0.78186861, -0.05373430, 0.45442899, 0.04408369,
        -0.31418560, -0.20741901, -1.04119340)
  zvar &lt;- c(0.39326652, 0.72391174, -0.07690784, 0.37914638, 0.43709349, -1.28395765, -1.31900029,
        0.52676516, 0.37331202, -0.15362952)
  colgroup &lt;- c(2,4,4,2,2,3,3,2,2,2)
  brands &lt;- c('a','b','c','d','e','f','g','h','i','j')
  
  plot3d(xvar, yvar, zvar, bbox=TRUE,
     type="s", col=colgroup, 
     size=0.05, alpha=0.50, radius=0.2,
     xlab="Cost Leader", ylab="Performance Leader", zlab="Fashion Leader")
  text3d(x = xvar, y = yvar, z = zvar
     text = brands, adj=c(2.5,2.5), cex=0.7)
  </code></pre>
  
  <p>Questions:</p>
  
  <ol>
  <li><p>How can i put a light shade in the 3D-box so that it's not white</p></li>
  <li><p>How can i remove the x,y,z tick marks and their values on the axis so that the plot is a little less distracting.</p></li>
  </ol>
  
  <p>Thanks in advance!</p>
  
  <p>Regards,
  Siddarth</p>