diff --git a/scripts/deploy-nas.ps1 b/scripts/deploy-nas.ps1
index 2a024da..a40a20b 100644
--- a/scripts/deploy-nas.ps1
+++ b/scripts/deploy-nas.ps1
@@ -24,6 +24,34 @@ function Quote-Sh {
   return "'" + ($Value -replace "'", "'\''") + "'"
 }
 
+function Get-ObjectPropertyValue {
+  param(
+    [object]$Object,
+    [string]$Name
+  )
+  if ($null -eq $Object) {
+    return $null
+  }
+  $property = $Object.PSObject.Properties[$Name]
+  if ($null -eq $property) {
+    return $null
+  }
+  return $property.Value
+}
+
+function Test-ReleaseManifestRenderingGate {
+  param([object]$Manifest)
+  $renderingGate = Get-ObjectPropertyValue $Manifest "renderingGate"
+  $viewport = Get-ObjectPropertyValue $renderingGate "viewport"
+  return (
+    (Get-ObjectPropertyValue $renderingGate "requiredRenderer") -eq "webgl" -and
+    (Get-ObjectPropertyValue $renderingGate "compatibilityRenderer") -eq "canvas" -and
+    (Get-ObjectPropertyValue $viewport "width") -eq 1920 -and
+    (Get-ObjectPropertyValue $viewport "height") -eq 1080 -and
+    (Get-ObjectPropertyValue $viewport "deviceScaleFactor") -eq 1
+  )
+}
+
 Assert-Command "ssh"
 Assert-Command "scp"
 Assert-Command "git"
@@ -64,9 +92,14 @@ if (Test-Path $releaseManifestPath -PathType Leaf) {
     if ($existingReleaseManifest.app -ne "heros_web") {
       throw "Existing release manifest has unexpected app '$($existingReleaseManifest.app)'."
     }
-    if ($existingReleaseManifest.commit -eq $fullCommit) {
+    if (
+      $existingReleaseManifest.commit -eq $fullCommit -and
+      (Test-ReleaseManifestRenderingGate $existingReleaseManifest)
+    ) {
       $writeReleaseManifest = $false
       Write-Host "Using existing $releaseManifestPath for $commit"
+    } elseif ($existingReleaseManifest.commit -eq $fullCommit) {
+      Write-Host "Replacing incomplete $releaseManifestPath for $commit"
     } else {
       Write-Host "Replacing stale $releaseManifestPath commit $($existingReleaseManifest.commit) with $commit"
     }
@@ -81,6 +114,15 @@ if ($writeReleaseManifest) {
     shortCommit = $commit
     qaVersion = $qaVersion
     generatedAt = (Get-Date).ToUniversalTime().ToString("o")
+    renderingGate = @{
+      requiredRenderer = "webgl"
+      compatibilityRenderer = "canvas"
+      viewport = @{
+        width = 1920
+        height = 1080
+        deviceScaleFactor = 1
+      }
+    }
   } | ConvertTo-Json -Depth 4
   $utf8NoBom = New-Object System.Text.UTF8Encoding $false
   [System.IO.File]::WriteAllText($releaseManifestPath, "$releaseManifestJson`n", $utf8NoBom)