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<span class="anchor" id="line-1"></span><p class="line867">
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<h2 id="head-1ab58a6e522f9b7804f32a3891adf55af7450010">How to make the Shader System work for you, a basic guide</h2>
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<span class="anchor" id="line-2"></span><span class="anchor" id="line-3"></span><p class="line862">In this document, we’re going to go over basic shader issues and definitions, how to write them as well as what you can and can’t do with shaders. I’ll be going over mostly basics, i.e.: getting things in game issues. <strong>Materials</strong> are the same as <strong>Shaders</strong>, and the term is used interchangeably throughout the Quake 4 SDK. <span class="anchor" id="line-4"></span><span class="anchor" id="line-5"></span><p class="line867"><strong>In this document you will find:</strong> <span class="anchor" id="line-6"></span><ul><li><p class="line891"><strong>Section 1</strong>: <a href="/quake4/ArtReference_Q4Shaders_Definitions">Definitions</a> <span class="anchor" id="line-7"></span></li><li><p class="line891"><strong>Section 2</strong>: <a href="/quake4/ArtReference_Q4Shaders_Textures">How to write a shader for textures (longhand)</a> <span class="anchor" id="line-8"></span></li><li><p class="line891"><strong>Section 3</strong>: <a href="/quake4/ArtReference_Q4Shaders_Guides">Texture Guides</a> <span class="anchor" id="line-9"></span></li><li><p class="line891"><strong>Section 4</strong>: <a href="/quake4/ArtReference_Q4Shaders_Models">How to write a shader for models</a> <span class="anchor" id="line-10"></span></li><li><p class="line891"><strong>Section 5</strong>: <a href="/quake4/ArtReference_Q4Shaders_SkinFiles">.skin files</a> <span class="anchor" id="line-11"></span></li><li><p class="line891"><strong>Section 6</strong>: <a href="/quake4/ArtReference_Q4Shaders_Extra_Passes">Extra passes, additive and alpha</a> <span class="anchor" id="line-12"></span></li><li><p class="line891"><strong>Section 7</strong>: <a href="/quake4/ArtReference_Q4Shaders_Tables">Modulation with tables</a> <span class="anchor" id="line-13"></span></li><li><p class="line891"><strong>Section 8</strong>: <a href="/quake4/ArtReference_Q4Shaders_AnimatedStrips">Special Case:Animated shaders</a> <span class="anchor" id="line-14"></span><span class="anchor" id="line-15"></span></li></ul><p class="line874">Please understand that this document covers the bare-bones of the shader system. Fortunately, the bare-bones is sufficient for a lot of what the artist needs to do and it’s the basics that can lead to more complex shaders. <span class="anchor" id="line-16"></span><span class="anchor" id="line-17"></span><p class="line867"><hr /><p class="line874"> <span class="anchor" id="line-18"></span><span class="anchor" id="line-19"></span><p class="line867">
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<h2 id="head-9069596f72b521c8aeae0e01c9f85f05d85669d6">Troubleshooting</h2>
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<span class="anchor" id="line-20"></span><span class="anchor" id="line-21"></span><p class="line874">Troubleshooting shaders can be a little bit like finding a needled in a haystack. Unfortunately, I can’t go through every instance of what can happen, because this document would be immense. So I’ll go over some stuff to look for in a shader: <span class="anchor" id="line-22"></span><span class="anchor" id="line-23"></span><ol type="1"><li>Make sure all of your shader passes have an open and close brace. <span class="anchor" id="line-24"></span><span class="anchor" id="line-25"></span></li><li class="gap">Check your spelling <span class="anchor" id="line-26"></span><span class="anchor" id="line-27"></span></li><li class="gap">Check your path names. <span class="anchor" id="line-28"></span><span class="anchor" id="line-29"></span><ol type="i"><li>Make sure path names don’t have spaces. <span class="anchor" id="line-30"></span><span class="anchor" id="line-31"></span></li><li class="gap">Make sure the path actually exists. <span class="anchor" id="line-32"></span><span class="anchor" id="line-33"></span></li></ol></li></ol><p class="line874">The key to learning the shaders is experimenting, so the best thing to do is dive into the deep end and see what you get. <span class="anchor" id="line-34"></span><span class="anchor" id="bottom"></span></div><p id="pageinfo" class="info" lang="en" dir="ltr">ArtReference Q4Shaders (last edited 2005-11-09 20:30:30 by <span title="MattVainio @ 67.129.250.254[67.129.250.254]"><a class="nonexistent" href="/quake4/MattVainio" title="MattVainio @ 67.129.250.254[67.129.250.254]">MattVainio</a></span>)</p>
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