<p dir="auto">Repro: <a href="https://codesandbox.io/s/elegant-villani-9d3hr?file=/src/index.js" rel="nofollow">https://codesandbox.io/s/elegant-villani-9d3hr?file=/src/index.js</a></p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="import { TiltLoader } from &quot;three/examples/jsm/loaders/TiltLoader&quot;

new TiltLoader().load(&quot;/model.tilt&quot;, (scene) =&gt; console.log(scene))"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-kos">{</span> <span class="pl-v">TiltLoader</span> <span class="pl-kos">}</span> <span class="pl-k">from</span> <span class="pl-s">"three/examples/jsm/loaders/TiltLoader"</span>

<span class="pl-k">new</span> <span class="pl-v">TiltLoader</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">load</span><span class="pl-kos">(</span><span class="pl-s">"/model.tilt"</span><span class="pl-kos">,</span> <span class="pl-kos">(</span><span class="pl-s1">scene</span><span class="pl-kos">)</span> <span class="pl-c1">=&gt;</span> <span class="pl-smi">console</span><span class="pl-kos">.</span><span class="pl-en">log</span><span class="pl-kos">(</span><span class="pl-s1">scene</span><span class="pl-kos">)</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">This is the error message in a local env (Parcel):</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="TiltLoader.js:42 TypeError: _jszipModuleMin.JSZip is not a constructor
    at TiltLoader.parse (TiltLoader.js:59)
    at Object.onLoad (TiltLoader.js:32)
    at XMLHttpRequest.&lt;anonymous&gt; (three.module.js:36749)"><pre lang="text" class="notranslate"><code class="notranslate">TiltLoader.js:42 TypeError: _jszipModuleMin.JSZip is not a constructor
    at TiltLoader.parse (TiltLoader.js:59)
    at Object.onLoad (TiltLoader.js:32)
    at XMLHttpRequest.&lt;anonymous&gt; (three.module.js:36749)
</code></pre></div>
<p dir="auto">Looks like the morph weights are not calculated correctly in the software renderer. I have a simple grid-based weighting system which works correctly on WebGL but seems to have severe distortions on software renderer.</p>
<p dir="auto">WebGL version: <a href="http://samiarola.com/buggyrenderer/morpher.html" rel="nofollow">http://samiarola.com/buggyrenderer/morpher.html</a><br>
Software version: <a href="http://samiarola.com/buggyrenderer/morphersoft.html" rel="nofollow">http://samiarola.com/buggyrenderer/morphersoft.html</a></p>
<p dir="auto">If you pull the weights one by one, you can notice distortions if the values are not 0 or 1, and if you stack the weights, the whole model distorts badly. E-mail me (sami (at) ookoohko.com), I can send the test over.</p>