Reference:Normal Map - Revision history

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{{#indexentry:normal_map}}
Most of the time you will apply single normal pattern to an entire surface but you may also create a pattern or blend of normals using a <code>normal_map</code>. The syntax for a <code>normal_map</code> is identical to a <code>pigment_map</code> except you specify a <code> normal</code> in each map entry. The syntax for <code>normal_map</code> is as follows:
<pre>
NORMAL_MAP:
normal_map { NORMAL_MAP_BODY }
NORMAL_MAP_BODY:
NORMAL_MAP_IDENTIFIER | NORMAL_MAP_ENTRY...
NORMAL_MAP_ENTRY:
[ Value NORMAL_BODY ]
</pre>
Where <code>Value</code> is a float value between 0.0 and 1.0 inclusive and each NORMAL_BODY is anything which can be inside a <code>normal{...}</code> statement. The <code>normal</code> keyword and <code>{}</code> braces need not be specified.
Note: The <code>[]</code> brackets are part of the actual NORMAL_MAP_ENTRY. They are not notational symbols denoting optional parts. The brackets surround each entry in the normal map.
 There may be from 2 to 256 entries in the map.
For example:
<pre>
normal {
gradient x //this is the PATTERN_TYPE
normal_map {
[0.3 bumps scale 2]
[0.3 dents]
[0.6 dents]
[0.9 marble turbulence 1]
}
}
</pre>
When the <code>gradient x</code> function returns values from 0.0 to 0.3 then the scaled bumps normal is used. From 0.3 to 0.6 dents pattern is used. From 0.6 up to 0.9 a blend of dents and a turbulent marble is used. From 0.9 on up only the turbulent marble is used.
Normal maps may be nested to any level of complexity you desire. The normals in a map may have slope maps or normal maps or any type of normal you want.
A normal map is also used with the <code>average</code> normal type. See [[Reference:Average Pattern|Average]] for details.
Entire normals in a normal list may also be used with the block patterns such as <code>checker</code>, <code>hexagon</code> and <code>brick</code>. For example:
<pre>
normal {
checker
normal { gradient x scale .2 }
normal { gradient y scale .2 }
}
</pre>
Note: In the case of block patterns the <code>normal</code> wrapping is required around the normal information.
You may not use <code>normal_map</code> or individual normals with a <code>bump_map</code>. See section [[Reference:Patterned_Textures#Texture_Maps|Texture Maps]] for an alternative way to do this.
You may declare and use normal map identifiers but the only way to declare a normal block pattern list is to declare a normal identifier for the entire normal.

@@ Line 11: / Line 11: @@
 <p>Where <em><code>Value</code></em> is a float value between 0.0 and 1.0 inclusive and each <em>NORMAL_BODY</em> is anything which can be inside a <code>normal{...}</code> statement. The <code>normal</code> keyword and <code>{}</code> braces need not be specified.</p>
 <p class="Note"><strong>Note:</strong> The <code>[]</code> brackets are part of the actual <em>NORMAL_MAP_ENTRY</em>. They are not notational symbols denoting optional parts. The brackets surround each entry in the normal map.</p>
-<p>In <em>previous</em> versions there <em>had</em> to be from 2 to 256 entries in the map. A {{Change}} in version 3.7.1 has removed the upper restriction.</p>
+<p>In <em>previous</em> versions there <em>had</em> to be from 2 to 256 entries in the map. A {{Change}} in version 3.8 has removed the upper restriction.</p>
 <p>For example:</p>
 <pre>

@@ Line 11: / Line 11: @@
 <p>Where <em><code>Value</code></em> is a float value between 0.0 and 1.0 inclusive and each <em>NORMAL_BODY</em> is anything which can be inside a <code>normal{...}</code> statement. The <code>normal</code> keyword and <code>{}</code> braces need not be specified.</p>
 <p class="Note"><strong>Note:</strong> The <code>[]</code> brackets are part of the actual <em>NORMAL_MAP_ENTRY</em>. They are not notational symbols denoting optional parts. The brackets surround each entry in the normal map.</p>
-<p> There may be from 2 to 256 entries in the map.</p>
+<p>In <em>previous</em> versions there <em>had</em> to be from 2 to 256 entries in the map. A {{Change}} in version 3.7.1 has removed the upper restriction.</p>
 <p>For example:</p>
 <pre>

@@ Line 36: / Line 36: @@
 </pre>
 <p class="Note"><strong>Note:</strong> In the case of block patterns the <code>normal</code> wrapping is required around the normal information.</p>
-<p>You may not use <code>normal_map</code> or individual normals with a <code>bump_map</code>. See section <!--<linkto "Texture Maps">Texture Maps</linkto>--->[[Reference:Patterned_Textures#Texture_Maps|Texture Maps]] for an alternative way to do this.</p>
+<p>You may not use <code>normal_map</code> or individual normals with a <code>bump_map</code>. See section <!--<linkto "Texture Maps">Texture Maps</linkto>--->[[Reference:Patterned Textures#Texture Maps|Texture Maps]] for an alternative way to do this.</p>
 <p>You may declare and use normal map identifiers but the only way to declare a normal block pattern list is to declare a normal identifier for the entire normal.</p>

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