st</span><span>: </span><span class="identifier">vec3</span><span>): </span><span class="identifier">vec3</span><span> =
        </span><span class="keyword">var</span><span> </span><span class="identifier">fresnel</span><span>: </span><span class="type-name">Float</span><span> = </span><span class="identifier">clamp</span><span>(</span><span class="number-literal">1.0f</span><span> - </span><span class="identifier">dot</span><span>(</span><span class="identifier">n</span><span>, -</span><span class="identi