ters:</p><table class="table table-bordered params"><tr><th style="width:25%;"><code>ImageFile</code></th><td><p>An embedded graphic, preferably black and white.</p></td></tr><tr><th style="width:25%;"><code>Invert</code></th><td><p>Load white pixels as solid instead.</p></td></tr><tr><th style="width:25%;"><code>Scale</code></th><td><p>Default is 1.  Scale of 2 means each pixel forms a 2x2 block of tiles, and so on.</p></td></tr><tr><th style="width:25%;"><code>ColorMap</code></th><td><p>An array of color 