diff --git a/tools/trace_replay/README.md b/tools/trace_replay/README.md
index 9de625a6..87ab8d8b 100644
--- a/tools/trace_replay/README.md
+++ b/tools/trace_replay/README.md
@@ -103,6 +103,13 @@ The bundled fixtures cover:
 - minecraft-1.21.4-fabric-iris-sundial-lite-in-world: captured from Minecraft 1.21.4 Fabric with Sodium, Iris, and
   Sundial Lite after entering a singleplayer world.
   ![Minecraft 1.21.4 Fabric Iris Sundial Lite in-world golden](fixtures/minecraft-1.21.4-fabric-iris-sundial-lite-in-world.0000150023.png)
+- minecraft-1.21.1-neoforge-create-indirect-in-world: captured from Minecraft 1.21.1 NeoForge with Create, Sodium,
+  and Iris (no shader pack) in a world facing Create water wheels and a large cogwheel, with Flywheel's
+  `flywheel:indirect` backend (compute-shader culling, glMultiDrawElementsIndirect, persistent-mapped staging).
+  ![Minecraft 1.21.1 NeoForge Create indirect in-world golden](fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.0000504631.png)
+- minecraft-1.21.1-neoforge-create-instancing-in-world: same world and camera as the indirect case, with Flywheel's
+  `flywheel:instancing` backend (texture-buffer instance data, glDrawElementsInstancedBaseVertex).
+  ![Minecraft 1.21.1 NeoForge Create instancing in-world golden](fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.0000530333.png)
 
 Build from the MobileGL repository root:
 
diff --git a/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.0000504631.png b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.0000504631.png
new file mode 100644
index 00000000..e7682780
--- /dev/null
+++ b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.0000504631.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:346ef70898a9169446bd6b6a8155ad9470dfc6fd7338705930853becc2b0eb5f
+size 280527
diff --git a/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.tgz b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.tgz
new file mode 100644
index 00000000..59d840a2
--- /dev/null
+++ b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-indirect-in-world.tgz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f22620a6f87cbcf3d5c82cbccd53d21453dd2350dbc187f78cd6ac19218719ed
+size 7196659
diff --git a/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.0000530333.png b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.0000530333.png
new file mode 100644
index 00000000..b7756c90
--- /dev/null
+++ b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.0000530333.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ee35d41900350b70b322791631a4aa923c0dd7c5f9fbb6a0f526dd27016528b9
+size 280621
diff --git a/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.tgz b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.tgz
new file mode 100644
index 00000000..fcf8e760
--- /dev/null
+++ b/tools/trace_replay/fixtures/minecraft-1.21.1-neoforge-create-instancing-in-world.tgz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7700eb607003751176efcdd06fa5442b461640b41a83eac850ad7e4bbf9d62f4
+size 7564562
diff --git a/tools/trace_replay/trace_cases.json b/tools/trace_replay/trace_cases.json
index 9d2e0fb4..eaa407b0 100644
--- a/tools/trace_replay/trace_cases.json
+++ b/tools/trace_replay/trace_cases.json
@@ -257,6 +257,20 @@
       "golden": "minecraft-1.21.4-fabric-iris-derivative-main-d24.4.14-in-world.0000145353.png",
       "alternate_golden": "minecraft-1.21.4-fabric-iris-derivative-main-d24.4.14-in-world.0000145353-android-angle.png",
       "target_call": 145353
+    },
+    {
+      "name": "minecraft-1.21.1-neoforge-create-indirect-in-world",
+      "trace_archive": "minecraft-1.21.1-neoforge-create-indirect-in-world.tgz",
+      "golden": "minecraft-1.21.1-neoforge-create-indirect-in-world.0000504631.png",
+      "target_call": 504631,
+      "timeout_seconds": 1800
+    },
+    {
+      "name": "minecraft-1.21.1-neoforge-create-instancing-in-world",
+      "trace_archive": "minecraft-1.21.1-neoforge-create-instancing-in-world.tgz",
+      "golden": "minecraft-1.21.1-neoforge-create-instancing-in-world.0000530333.png",
+      "target_call": 530333,
+      "timeout_seconds": 1800
     }
   ]
 }