Index: /issm/trunk-jpl/src/m/plot/plot_overlay.js
===================================================================
--- /issm/trunk-jpl/src/m/plot/plot_overlay.js	(revision 21163)
+++ /issm/trunk-jpl/src/m/plot/plot_overlay.js	(revision 21164)
@@ -62,5 +62,5 @@
 	canvas.nodes[canvas.nodes.length] = node;
 	scale = 1;
-	node["shaderName"] = "GroundFromSpace";
+	node["shaderName"] = (options.getfieldvalue('atmosphere','off') == 'on') ? "GroundFromSpace" : "Textured";
 	node["shader"] = gl["shaders"][node["shaderName"]];
 	node["scale"] = [scale, scale, scale * matrixscale];
Index: /issm/trunk-jpl/src/m/plot/plotdoc.js
===================================================================
--- /issm/trunk-jpl/src/m/plot/plotdoc.js	(revision 21163)
+++ /issm/trunk-jpl/src/m/plot/plotdoc.js	(revision 21164)
@@ -47,4 +47,5 @@
 	console.log('       "overlay": overlay a radar amplitude image behind (default "off", ex: "on", "off")');
 	console.log('       "overlay_image": path to overlay image (default "off", ex: "on", "off")');
+	console.log('       "atmosphere": toggle atmospheric/skysphere shading. (default "off", ex: "on", "off")');
 	console.log('       "alpha": transparency coefficient 0.0 to 1.0, the lower, the more transparent. (default 1.0, ex: 0.5, 0.25)');
 	console.log('       "heightscale": scaling factor to accentuate height. (default 1, ex: 0.5, 100)');