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	<id>https://wiki.zzt.org/w/index.php?action=history&amp;feed=atom&amp;title=Invisible</id>
	<title>Invisible - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://wiki.zzt.org/w/index.php?action=history&amp;feed=atom&amp;title=Invisible"/>
	<link rel="alternate" type="text/html" href="https://wiki.zzt.org/w/index.php?title=Invisible&amp;action=history"/>
	<updated>2026-07-03T10:24:07Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.43.9</generator>
	<entry>
		<id>https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=387&amp;oldid=prev</id>
		<title>The Green Herring: zzt-oop name, byte</title>
		<link rel="alternate" type="text/html" href="https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=387&amp;oldid=prev"/>
		<updated>2021-02-13T19:10:21Z</updated>

		<summary type="html">&lt;p&gt;zzt-oop name, byte&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:10, 13 February 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Element&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Element&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|id=28&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;|zzt-oop name=invisible&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|id=&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;{{Byte|&lt;/ins&gt;28&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;}}&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|char={{CharSwatch|32}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|char={{CharSwatch|32}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|category=terrain&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|category=terrain&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key zztwiki:diff:1.41:old-378:rev-387:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>The Green Herring</name></author>
	</entry>
	<entry>
		<id>https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=378&amp;oldid=prev</id>
		<title>The Green Herring at 19:05, 13 February 2021</title>
		<link rel="alternate" type="text/html" href="https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=378&amp;oldid=prev"/>
		<updated>2021-02-13T19:05:11Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:05, 13 February 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l12&quot;&gt;Line 12:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 12:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The invisible has been frequently used to make invisible mazes and forcefields since the official worlds. However, most modern games use a [[ZZT-OOP]] program that performs an [[If|#if]] [[any]] check on normals of a particular color, and then uses [[Change|#change]] on invisibles to execute a fade effect displaying normals, [[breakable]]s and [[water]] before changing them back to invisibles. Besides being a more accurate depiction of forcefields, this allows the player to very briefly see the structure of the invisible maze, preventing frustration.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The invisible has been frequently used to make invisible mazes and forcefields since the official worlds. However, most modern games use a [[ZZT-OOP]] program that performs an [[If|#if]] [[any]] check on normals of a particular color, and then uses [[Change|#change]] on invisibles to execute a fade effect displaying normals, [[breakable]]s and [[water]] before changing them back to invisibles. Besides being a more accurate depiction of forcefields, this allows the player to very briefly see the structure of the invisible maze, preventing frustration.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Invisibles can be placed by the engine, programmatically or not, in the seven default [[ZZT-OOP]] colors, and external editors allow them to be drawn in any available color. If the background is not black, the invisible initially &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;appears as &lt;/del&gt;a solid &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;block &lt;/del&gt;in the background color until it is touched, so such invisibles are best used around decorative [[fake]]s where both the foreground and background colors are the same.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Invisibles can be placed by the engine, programmatically or not, in the seven default [[ZZT-OOP]] colors, and external editors allow them to be drawn in any available color. If the background is not black, the invisible initially &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;looks like &lt;/ins&gt;a &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[&lt;/ins&gt;solid&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]] &lt;/ins&gt;in the background color until it is touched, so such invisibles are best used around decorative [[fake]]s where both the foreground and background colors are the same.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In the internal editor, invisibles are rendered with {{CharSwatch|176}} for the benefit of the designer. External editors replicate this, though some applications make it optional.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In the internal editor, invisibles are rendered with {{CharSwatch|176}} for the benefit of the designer. External editors replicate this, though some applications make it optional.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>The Green Herring</name></author>
	</entry>
	<entry>
		<id>https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=377&amp;oldid=prev</id>
		<title>The Green Herring: +colors</title>
		<link rel="alternate" type="text/html" href="https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=377&amp;oldid=prev"/>
		<updated>2021-02-13T19:02:14Z</updated>

		<summary type="html">&lt;p&gt;+colors&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:02, 13 February 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l11&quot;&gt;Line 11:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 11:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The invisible has been frequently used to make invisible mazes and forcefields since the official worlds. However, most modern games use a [[ZZT-OOP]] program that performs an [[If|#if]] [[any]] check on normals of a particular color, and then uses [[Change|#change]] on invisibles to execute a fade effect displaying normals, [[breakable]]s and [[water]] before changing them back to invisibles. Besides being a more accurate depiction of forcefields, this allows the player to very briefly see the structure of the invisible maze, preventing frustration.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The invisible has been frequently used to make invisible mazes and forcefields since the official worlds. However, most modern games use a [[ZZT-OOP]] program that performs an [[If|#if]] [[any]] check on normals of a particular color, and then uses [[Change|#change]] on invisibles to execute a fade effect displaying normals, [[breakable]]s and [[water]] before changing them back to invisibles. Besides being a more accurate depiction of forcefields, this allows the player to very briefly see the structure of the invisible maze, preventing frustration.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Invisibles can be placed by the engine, programmatically or not, in the seven default [[ZZT-OOP]] colors, and external editors allow them to be drawn in any available color. If the background is not black, the invisible initially appears as a solid block in the background color until it is touched, so such invisibles are best used around decorative [[fake]]s where both the foreground and background colors are the same.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In the internal editor, invisibles are rendered with {{CharSwatch|176}} for the benefit of the designer. External editors replicate this, though some applications make it optional.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In the internal editor, invisibles are rendered with {{CharSwatch|176}} for the benefit of the designer. External editors replicate this, though some applications make it optional.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>The Green Herring</name></author>
	</entry>
	<entry>
		<id>https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=376&amp;oldid=prev</id>
		<title>The Green Herring: You are blocked by an invisible wall.</title>
		<link rel="alternate" type="text/html" href="https://wiki.zzt.org/w/index.php?title=Invisible&amp;diff=376&amp;oldid=prev"/>
		<updated>2021-02-13T18:56:59Z</updated>

		<summary type="html">&lt;p&gt;You are blocked by an invisible wall.&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Element&lt;br /&gt;
|id=28&lt;br /&gt;
|char={{CharSwatch|32}}&lt;br /&gt;
|category=terrain&lt;br /&gt;
|stats=no&lt;br /&gt;
|effect on movement=wall&lt;br /&gt;
|destructible=no&lt;br /&gt;
|uses zzt-oop color=yes}}&lt;br /&gt;
&lt;br /&gt;
The &amp;#039;&amp;#039;&amp;#039;invisible&amp;#039;&amp;#039;&amp;#039; element is one of the built-in wall materials in [[ZZT]]. It is a wall tile that, as indicated, initially appears invisible except for its background color. However, when the [[player]] touches it, the engine announces, &amp;quot;You are blocked by an invisible wall.&amp;quot; and places a [[normal]] in its location.&lt;br /&gt;
&lt;br /&gt;
The invisible has been frequently used to make invisible mazes and forcefields since the official worlds. However, most modern games use a [[ZZT-OOP]] program that performs an [[If|#if]] [[any]] check on normals of a particular color, and then uses [[Change|#change]] on invisibles to execute a fade effect displaying normals, [[breakable]]s and [[water]] before changing them back to invisibles. Besides being a more accurate depiction of forcefields, this allows the player to very briefly see the structure of the invisible maze, preventing frustration.&lt;br /&gt;
&lt;br /&gt;
In the internal editor, invisibles are rendered with {{CharSwatch|176}} for the benefit of the designer. External editors replicate this, though some applications make it optional.&lt;br /&gt;
&lt;br /&gt;
[[Category:Elements]]&lt;br /&gt;
{{ElementsNavbox}}&lt;/div&gt;</summary>
		<author><name>The Green Herring</name></author>
	</entry>
</feed>