diff --git a/script.html b/script.html
index ae2ac0b..4db270d 100644
--- a/script.html
+++ b/script.html
@@ -88,6 +88,24 @@ function shotHtml(s, locked) {
     : '<label class="mini">Which photo of them</label>'
       + '<select data-photo="' + s.index + '">' + photoOptions(s.photo_id) + '</select>';
 
+  // A cutaway belonging to this shot straddles the cut into the next one, so
+  // the registration jump happens off screen.
+  var br = s.broll || {};
+  var brollBlock = '';
+  if (br.subject) {
+    brollBlock = '<div style="margin-top:16px;padding-top:14px;border-top:1px solid var(--line)">'
+      + '<label class="mini">Cutaway <span>— shown while this line is spoken, covering the cut</span></label>'
+      + '<p class="foot" style="margin:0 0 8px">' + esc(br.subject) + ' · ' + esc(br.kind || 'image') + '</p>'
+      + (s.broll_url
+          ? (s.broll_kind === 'video'
+              ? '<video src="' + esc(s.broll_url) + '" controls playsinline style="width:120px;border-radius:8px;border:1px solid var(--line)"></video>'
+              : '<img src="' + esc(s.broll_url) + '" alt="cutaway" style="width:120px;border-radius:8px;border:1px solid var(--line);display:block">')
+          : '')
+      + (locked ? '' : '<button type="button" class="btn ghost" data-broll="' + s.index + '" style="margin-top:10px">'
+          + (s.broll_url ? 'Remake cutaway' : 'Make cutaway') + '</button>')
+      + '</div>';
+  }
+
   var controls = locked ? '' :
       toggle
     + settingLabel
@@ -109,6 +127,7 @@ function shotHtml(s, locked) {
     + '<p class="line">' + esc(s.line || "") + '</p>'
     + '<p class="foot">' + (s.word_count || 0) + ' words · about ' + (s.est_seconds || 0) + 's</p>'
     + '<div style="margin-top:16px">' + controls + '</div>'
+    + brollBlock
     + '</div></div>';
 }
 
@@ -151,6 +170,22 @@ function render(r) {
   var cams = '<datalist id="cams">' + PRESETS.map(function (c) {
     return '<option value="' + esc(c) + '">'; }).join("") + '</datalist>';
 
+  // Post production only exists once there is footage to cut.
+  var post = '';
+  if (p.status === 'ready' || p.cut_url) {
+    post = '<h2 class="sec" style="margin-top:34px">The cut</h2><div class="card">'
+      + (p.cut_url
+          ? '<video src="' + esc(p.cut_url) + '" controls playsinline style="width:190px;aspect-ratio:9/16;border-radius:10px;border:1px solid var(--line);background:#000;display:block;margin-bottom:14px"></video>'
+          : '')
+      + '<p class="foot" style="margin:0 0 12px">Cutaways are laid across the joins between shots, '
+      + 'so the picture changes while the voice keeps going and the join is never on screen.</p>'
+      + '<button type="button" class="btn ghost" id="seams">Measure the joins</button>'
+      + '<button type="button" class="btn" id="cut" style="margin-left:10px">'
+      + (p.cut_url ? 'Cut it again' : 'Cut the B-roll in') + '</button>'
+      + '<div id="seamout" style="margin-top:14px"></div>'
+      + '</div>';
+  }
+
   var actions = locked
     ? '<div class="card"><p style="margin:0"><strong>Approved.</strong> Filming is switched on once payment is live. Nothing has been charged.</p></div>'
     : '<div class="card">'
@@ -167,12 +202,14 @@ function render(r) {
   out.innerHTML = cams + head + warn + full
     + '<h2 class="sec">The shots</h2>'
     + s.segments.map(function (x) { return shotHtml(x, locked); }).join("")
+    + post
     + actions;
 
   wire(locked);
 }
 
 function wire(locked) {
+  bindPost();
   if (locked) { bindBottom(); return; }
 
   // Save edits when the field loses focus, so typing is never interrupted.
@@ -204,6 +241,29 @@ function wire(locked) {
     });
   });
 
+  [].forEach.call(document.querySelectorAll("[data-broll]"), function (b) {
+    b.addEventListener("click", async function () {
+      hideMsg("msg");
+      var idx = parseInt(b.getAttribute("data-broll"), 10);
+      b.disabled = true; b.textContent = "Making…";
+      var r = await api("make_broll", { email: email, project_id: pid, index: idx });
+      if (!r.ok) { b.disabled = false; b.textContent = "Make cutaway"; showMsg("msg", r.error || "Could not make that."); return; }
+      var waited = 0;
+      var t = setInterval(async function () {
+        waited += 5;
+        var g = await api("get_project", { email: email, project_id: pid });
+        var seg = (g.ok && g.script && g.script.segments || []).filter(function (x) {
+          return parseInt(x.index, 10) === idx; })[0];
+        if (seg && seg.broll_url) { clearInterval(t); load(); return; }
+        if (waited > 180) {
+          clearInterval(t);
+          b.disabled = false; b.textContent = "Make cutaway";
+          showMsg("msg", "That cutaway is taking unusually long.");
+        }
+      }, 5000);
+    });
+  });
+
   [].forEach.call(document.querySelectorAll("[data-make]"), function (b) {
     b.addEventListener("click", async function () {
       hideMsg("msg");
@@ -249,6 +309,51 @@ function wire(locked) {
   bindBottom();
 }
 
+function bindPost() {
+  var sb = document.getElementById("seams");
+  if (sb) sb.onclick = async function () {
+    sb.disabled = true; sb.textContent = "Measuring…";
+    var r = await api("seam_report", { email: email, project_id: pid });
+    sb.disabled = false; sb.textContent = "Measure the joins";
+    var el = document.getElementById("seamout");
+    if (!r.ok) { showMsg("msg", r.error || "Could not measure."); return; }
+    if (!r.seams || !r.seams.length) {
+      el.innerHTML = '<p class="foot">' + esc(r.status_text || "Nothing to measure.") + '</p>';
+      return;
+    }
+    el.innerHTML = '<p class="foot" style="margin:0 0 8px">' + esc(r.status_text || "") + '</p>'
+      + r.seams.map(function (x) {
+          var col = x.verdict === "smooth" ? "var(--good)"
+                  : (x.verdict === "visible" ? "var(--accent2)" : "var(--bad)");
+          return '<div class="foot" style="padding:6px 0;border-top:1px solid var(--line)">'
+            + 'shot ' + x.after_shot + ' → ' + x.before_shot + ' at ' + x.at_seconds + 's · '
+            + 'shift ' + x.shift_x + ',' + x.shift_y + ' · drift ' + x.drift + ' · '
+            + '<span style="color:' + col + '">' + esc(x.verdict) + '</span>'
+            + (x.recommend_broll ? ' · worth a cutaway' : '')
+            + '</div>';
+        }).join("");
+  };
+
+  var cb = document.getElementById("cut");
+  if (cb) cb.onclick = async function () {
+    hideMsg("msg");
+    cb.disabled = true; cb.textContent = "Cutting…";
+    var r = await api("render_cut", { email: email, project_id: pid });
+    if (!r.ok) { cb.disabled = false; cb.textContent = "Cut the B-roll in"; showMsg("msg", r.error || "Could not cut."); return; }
+    var waited = 0;
+    var t = setInterval(async function () {
+      waited += 5;
+      var g = await api("get_project", { email: email, project_id: pid });
+      if (g.ok && g.project && g.project.cut_url) { clearInterval(t); load(); return; }
+      if (waited > 300) {
+        clearInterval(t);
+        cb.disabled = false; cb.textContent = "Cut the B-roll in";
+        showMsg("msg", "That is taking unusually long. Try again shortly.");
+      }
+    }, 5000);
+  };
+}
+
 function bindBottom() {
   var rv = document.getElementById("revise");
   if (rv) rv.onclick = async function () {