">%   using a technique that does not support interpolation).  However, when</span>
0053 <span class="comment">%   M x N is less than 2500, interpolation can be used for spatial data</span>
0054 <span class="comment">%   smoothing.  Note that OpenGL and zbuffer interpolate differently; in</span>
0055 <span class="comment">%   general, zbuffer interpolates in the colormap and is thus a more</span>
0056 <span class="comment">%   accurate spatial smoothing.  However, OpenGL may be faster on systems</span>
0057