Index: binaries/data/mods/public/maps/scenarios/Structures_demo.js
===================================================================
--- binaries/data/mods/public/maps/scenarios/Structures_demo.js
+++ binaries/data/mods/public/maps/scenarios/Structures_demo.js
@@ -0,0 +1,133 @@
+/**
+ * Coordinates of the first entity.
+ */
+let startX = 50;
+let startZ = 50;
+
+/**
+ * Coordinates of the current entity.
+ */
+let x = startX;
+let z = startZ;
+
+/**
+ * Horizontal coordinate of the last entity in the current row.
+ */
+let stopX = 1550;
+
+/**
+ * Space between entities.
+ */
+let gap = 14;
+let maxh = 50;
+
+let row = ""
+let ents = [];
+let cmpTemplateManager = Engine.QueryInterface(SYSTEM_ENTITY, IID_TemplateManager);
+
+for (let template of cmpTemplateManager.FindAllPlaceableTemplates(false))
+{
+	if (template.substr(0,4) != "stru")
+		continue;
+
+	if (template.indexOf("wallset") != -1)
+		continue;
+
+	// comment out these two lines to do all civs
+//	if (template.substr(0,15) != "structures/maur")
+//		continue;
+
+	print(template + "...\n");
+
+	let ent = Engine.AddEntity(template);
+	if (!ent)
+	{
+		error("Failed to load " + template + "\n");
+		continue;
+	}
+
+	let cmpFootprint = Engine.QueryInterface(ent, IID_Footprint);
+	if (!cmpFootprint)
+	{
+		print(template + " has no footprint\n");
+		continue;
+	}
+
+	let cmpPosition = Engine.QueryInterface(ent, IID_Position);
+	if (!cmpPosition)
+	{
+		warn(template + " has no position\n");
+		Engine.DestroyEntity(ent);
+		continue;
+	}
+
+	let shape = cmpFootprint.GetShape();
+	let w = shape.width;
+	let h = shape.depth;
+
+	if (shape.type == 'circle')
+		w = h = shape.radius * 2;
+
+	// add a gap when starting a new civ
+	if (row != template.substr(0,15))
+	{
+		row = template.substr(0,15);
+		x += maxh;
+	}
+
+	// start a new row
+	if (x + w >= stopX)
+	{
+		x = startX;
+		z += 3 * maxh + gap;
+	}
+
+	cmpPosition.MoveTo(x + w / 2, z + 2 * maxh);
+	cmpPosition.SetYRotation(Math.PI * 3 / 4);
+
+	let cmpOwnership = Engine.QueryInterface(ent, IID_Ownership);
+	if (cmpOwnership)
+		cmpOwnership.SetOwner(1);
+
+	// add the corresponding halfway-built foundation to the next row
+	let template2 = "foundation|" + template;
+	let ent2 = Engine.AddEntity(template2);
+
+	let cmpPosition2 = Engine.QueryInterface(ent2, IID_Position);
+	cmpPosition2.MoveTo(x + w / 2, z + maxh);
+	cmpPosition2.SetYRotation(Math.PI * 3 / 4);
+
+	let cmpOwnership2 = Engine.QueryInterface(ent2, IID_Ownership);
+	cmpOwnership2.SetOwner(1);
+
+	let cmpFoundation2 = Engine.QueryInterface(ent2, IID_Foundation);
+	cmpFoundation2.InitialiseConstruction(1, template);
+
+	let cmpCost = Engine.QueryInterface(ent, IID_Cost);
+	cmpFoundation2.Build(0, cmpCost.GetBuildTime() / 2);
+
+	// add the corresponding foundation to the next row
+	let template3 = "foundation|" + template;
+	let ent3 = Engine.AddEntity(template3);
+
+	let cmpPosition3 = Engine.QueryInterface(ent3, IID_Position);
+	cmpPosition3.MoveTo(x + w / 2, z);
+	cmpPosition3.SetYRotation(Math.PI * 3 / 4);
+
+	let cmpOwnership3 = Engine.QueryInterface(ent3, IID_Ownership);
+	cmpOwnership3.SetOwner(1);
+
+	let cmpFoundation3 = Engine.QueryInterface(ent3, IID_Foundation);
+	cmpFoundation3.InitialiseConstruction(1, template);
+
+	x += w + gap;
+	ents.push(ent);
+	ents.push(ent2);
+	ents.push(ent3);
+}
+
+print(ents.length + " entities\n");
+
+// draw the footprint around every building and foundation
+let cmpGUIInterface = Engine.QueryInterface(SYSTEM_ENTITY, IID_GuiInterface);
+cmpGUIInterface.SetSelectionHighlight(1, { "entities": ents, "alpha": 1, "selected": true });
Index: binaries/data/mods/public/maps/scenarios/Structures_demo.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Structures_demo.xml
+++ binaries/data/mods/public/maps/scenarios/Structures_demo.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<Scenario version="6">
+	<Terrain patches="25" texture="blackness" priority="0" height="16384"/>
+	<Environment>
+		<SkySet>default</SkySet>
+		<SunColor r="0.811765" g="0.792157" b="0.701961"/>
+		<SunElevation angle="0.785398"/>
+		<SunRotation angle="5.49779"/>
+		<TerrainAmbientColor r="0.313726" g="0.376471" b="0.521569"/>
+		<UnitsAmbientColor r="0.501961" g="0.501961" b="0.501961"/>
+		<Water>
+			<WaterBody>
+				<Type>lake</Type>
+				<Color r="0.3" g="0.35" b="0.7"/>
+				<Height>5</Height>
+				<Waviness>4.0</Waviness>
+				<Murkiness>0.45</Murkiness>
+				<Tint r="0.28" g="0.3" b="0.59"/>
+			</WaterBody>
+		</Water>
+	</Environment>
+	<Camera>
+		<Position x="141.287" y="78.0967" z="32.4902"/>
+		<Rotation angle="0"/>
+		<Declination angle="0.523599"/>
+	</Camera>
+	<ScriptSettings><![CDATA[
+	{
+		"Name":"Structures Demo",
+		"Description":"Demo map to examine structures and their foundations (and rubble).",
+		"Keywords": [
+			"demo"
+		],
+		"PlayerData":
+		[
+			{
+				"Civ":"athen"
+			}
+		],
+		"RevealMap":true,
+		"GameType":"endless",
+		"TriggerScripts": [
+			"scenarios/Structures_demo.js"
+		]
+	}
+	]]></ScriptSettings>
+	<Entities/>
+	<Paths/>
+	<Triggers/>
+</Scenario>