title: RenderMonkey not recognising my variables
body: <p>My HLSL shader takes a parameter:</p>
  
  <p><code>, uniform float4x4 wm</code></p>
  
  <p>Putting this into RM I get an error : <em>"Missing shader constant parameter named '$wm'"</em>
  I created a 4x4 matrix variable <code>wm</code> but it doesn't change anything (and you aren't allowed to add <code>$wm</code>).
  How am I supposed to set this up?</p>