diff --git a/emulator/firmware-decomp/render-readout.html b/emulator/firmware-decomp/render-readout.html
index 129108a..959e569 100644
--- a/emulator/firmware-decomp/render-readout.html
+++ b/emulator/firmware-decomp/render-readout.html
@@ -375,9 +375,12 @@
     <div class="hero-render" style="margin-top:16px">
       <span class="tag">exact recovery · edge equations solved to vertices</span>
       <canvas id="benchframe" width="832" height="512" aria-label="the hardware test pattern recovered exactly from compiled edge equations"></canvas>
-      <div class="cap"><b>the VelociRender test bench</b> — every triangle solved from its
-      compiled edge equations; colors distinguish primitives (true per-primitive colors live
-      in the payload's colour planes, still being decoded).</div>
+      <div class="cap"><b>the VelociRender test bench — the 3D scene layer</b>: every triangle
+      solved from its compiled edge equations (palette colors; the true shades are texture-ramp
+      scalars, decoded but not yet mapped). Beneath this layer the bench paints <b>SMPTE colour
+      bars</b> — the standard background program present byte-identical in every capture; its
+      bit-serial sweep is the next execution target, with the known bar pattern as the
+      pixel-exact acceptance oracle.</div>
     </div>
   </section>