"identifier">smoothstep</span><span>(</span><span class="number-literal">0.0f</span><span>, -</span><span class="number-literal">0.02f</span><span>, </span><span class="identifier">dir</span><span>.</span><span class="identifier">y</span><span>), </span><span class="number-literal">0.2f</span><span>)
        )
      }

      </span><span class="comment">// main
</span><span>      </span><span class="keyword">def</span><span> </span><span class="declaration-name">mainImage</span><span>(</span><span class="id