diff --git a/.gitignore b/.gitignore
index 792276ae..15141092 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ test/assets/classic/.downloaded
 # Skinned character: CesiumMan glTF is committed under test/assets/skinned/cesium_man/
 # (see ATTRIBUTION.md). Re-run scripts/download_skinned_character.sh to refresh.
 .vscode/
+.local-tools/
  .superpowers/
 artifacts-local-test/
 imgui.ini
diff --git a/examples/building/imgui.ini b/examples/building/imgui.ini
index 01a61e2b..84fe625b 100644
--- a/examples/building/imgui.ini
+++ b/examples/building/imgui.ini
@@ -13,3 +13,13 @@ Pos=12,8
 Size=803,322
 Collapsed=0
 
+[Window][###map-input/Window]
+Pos=24,88
+Size=672,504
+Collapsed=0
+
+[Window][###hud/建造面板]
+Pos=724,20
+Size=532,756
+Collapsed=0
+
diff --git a/examples/castle-generator/main.nut b/examples/castle-generator/main.nut
index 825c8644..89371e34 100644
--- a/examples/castle-generator/main.nut
+++ b/examples/castle-generator/main.nut
@@ -65,19 +65,21 @@ function rebuildCastle() {
 
 if (castleCamera == null) {
     castleCamera = eve.Camera3D();
-    castleCamera.setEye(54.0, 34.0, -58.0);
-    castleCamera.setTarget(0.0, 5.0, 0.0);
-    castleCamera.setUp(0.0, 1.0, 0.0);
-    castleCamera.setFov(43.0);
-    castleCamera.setAmbient(0.23, 0.25, 0.29);
     castleCamera.setActive(true);
-    gfx.setDirectionalLight(-0.55, -1.0, -0.35, 1.45, 1.30, 1.08);
 }
+// Default far plane is 100 m; a rotating keep with outer rings sits past that.
+castleCamera.setEye(88.0, 52.0, -96.0);
+castleCamera.setTarget(0.0, 7.0, 0.0);
+castleCamera.setUp(0.0, 1.0, 0.0);
+castleCamera.setFov(38.0);
+castleCamera.setClipPlanes(0.5, 2000.0);
+castleCamera.setAmbient(0.23, 0.25, 0.29);
+gfx.setDirectionalLight(-0.55, -1.0, -0.35, 1.45, 1.30, 1.08);
 if (castleParts.len() == 0) rebuildCastle();
 gfx.setBackgroundColor(0.10, 0.14, 0.20, 1.0);
 
 function eve_update(dt) {
-    castleYaw += dt * 3.5;
+    castleYaw += dt * 0.22;
     foreach (part in castleParts) part.setYaw(castleYaw);
     if (castlePressed("r") || castlePressed("R")) { castleSeed += 1; rebuildCastle(); }
     if (castlePressed("1")) { rings = max(1, rings - 1); rebuildCastle(); }
diff --git a/examples/character-motion-lab/main.nut b/examples/character-motion-lab/main.nut
index 25f935f9..ea53d7e2 100644
--- a/examples/character-motion-lab/main.nut
+++ b/examples/character-motion-lab/main.nut
@@ -32,6 +32,34 @@ function humanoidProfile(target) {
     return p;
 }
 
+// createRenderable enables the glTF extension PBR path whenever Assimp reports
+// an alphaMode. That shader is meant for IBL/capture, not this UI viewport:
+// albedo is decoded twice, linear ORM/normal maps are treated as sRGB, and the
+// characters render as a flat red unlit mass. Rebuild a conventional Material
+// so renderScene3DToCanvas uses mesh3d lighting like the original showcase.
+function labPreviewMaterial(part, albedo) {
+    local surface = gfx.newMaterial();
+    surface.setShadingModel("pbr");
+    surface.setMetallic(0.0);
+    surface.setRoughness(0.78);
+    surface.setReceiveLight(true);
+    surface.setReceiveShadow(true);
+    surface.setCastShadow(true);
+    surface.setTint(part.getTintR(), part.getTintG(), part.getTintB(), 1.0);
+    if (albedo != null) {
+        surface.setAlbedoTexture(albedo);
+        surface.setTint(1.0, 1.0, 1.0, 1.0);
+        part.setTexture(albedo);
+        part.setTint(1.0, 1.0, 1.0, 1.0);
+    }
+    part.setMaterial(surface);
+    part.setMetallic(0.0);
+    part.setRoughness(0.78);
+    part.setCastShadow(true);
+    part.setReceiveShadow(true);
+    part.setReceiveLight(true);
+}
+
 function addLabActor(model, name, x, source) {
     local sk = source ? lab.skeleton : anim.newSkeletonFromModel(model);
     local a = { model=model, name=name, skeleton=sk, clips=[], parts=[], skins=[],
@@ -50,14 +78,15 @@ function addLabActor(model, name, x, source) {
         if (!model.hasBones(i)) continue;
         local part = model3d.createRenderable(gfx, model, i);
         part.setPosition(x, 0.0, 0.0);
-        part.setCastShadow(true); part.setReceiveShadow(true); part.setReceiveLight(true);
-        part.setRoughness(0.78);
+        local albedo = null;
+        local imported = part.getMaterial();
+        if (imported != null) albedo = imported.getAlbedoTexture();
         local texturePath = model.getMaterialTexturePath(model.getMaterialIndex(i), "base_color", 0);
         if (texturePath != "") {
-            local texture = gfx.newTextureFromFile("assets/quaternius/" + texturePath);
-            a.textures.push(texture); part.setTexture(texture);
-            part.getMaterial().setAlbedoTexture(texture);
+            albedo = gfx.newTextureFromFile("assets/quaternius/" + texturePath);
+            a.textures.push(albedo);
         }
+        labPreviewMaterial(part, albedo);
         a.parts.push(part);
         a.skins.push(anim.newSkinFromModel(model, i, sk));
     }
@@ -98,11 +127,17 @@ eve_init = function() {
         "TARGET / Male", 2.5, false);
     lab.ground = eve.Renderable3D(); lab.ground.setMesh(gfx.newMeshCube(1.0));
     lab.ground.setPosition(0.0,-0.10,0.0); lab.ground.setScale(10.0,0.16,5.0);
-    lab.ground.setTint(0.13,0.17,0.21,1.0); lab.ground.setReceiveShadow(true);
+    lab.ground.setTint(0.13,0.17,0.21,1.0); lab.ground.setRoughness(0.92);
+    lab.ground.setReceiveShadow(true); lab.ground.setReceiveLight(true); lab.ground.setCastShadow(false);
     lab.camera = eve.Camera3D(); labCamera(); lab.camera.setUp(0.0,1.0,0.0);
     lab.camera.setFov(26.0); lab.camera.setAmbient(0.38,0.40,0.46); lab.camera.setActive(true);
+    gfx.setDirectionalLight(-0.4, 1.0, 0.7, 1.60, 1.49, 1.34);
     local key = eve.Light3D(); key.setType("dir"); key.setDirection(-0.4,1.0,0.7);
-    key.setColor(1.0,0.93,0.84,1.6); lab.lights.push(key);
+    key.setColor(1.0,0.93,0.84,1.6); key.setCastShadow(true); key.setShadowStrength(0.85);
+    lab.lights.push(key);
+    local fill = eve.Light3D(); fill.setType("point");
+    fill.setPosition(2.2, 2.6, 3.4); fill.setRadius(12.0);
+    fill.setColor(0.55, 0.68, 0.92, 1.15); lab.lights.push(fill);
     gfx.setBackgroundColor(0.045,0.065,0.09,1.0);
     ui.setScale(1.0); ui.setTheme("dark"); ui.beginBuild(); ui.beginWindow("Character Motion Lab", "root");
     ui.text("CHARACTER MOTION LAB   /   Quaternius CC0", "title");
diff --git a/src/modules/procgen/algorithms/CastleMesh.cpp b/src/modules/procgen/algorithms/CastleMesh.cpp
index 26077aca..69dcafb5 100644
--- a/src/modules/procgen/algorithms/CastleMesh.cpp
+++ b/src/modules/procgen/algorithms/CastleMesh.cpp
@@ -43,9 +43,18 @@ struct Builder {
             float x0=cx+std::cos(a0)*radius, z0=cz+std::sin(a0)*radius;
             float x1=cx+std::cos(a1)*radius, z1=cz+std::sin(a1)*radius;
             float am=(a0+a1)*0.5f;
-            quad(x0,y0,z0, x1,y0,z1, x1,y1,z1, x0,y1,z0,
+            // CCW from the outside, matching Graphics::newMeshCylinder / Vulkan
+            // front faces. The previous order wound the wall and cap inward, so
+            // back-face culling showed the interior of every tower.
+            quad(x0,y0,z0, x0,y1,z0, x1,y1,z1, x1,y0,z1,
                  std::cos(am),0,std::sin(am));
-            quad(cx,y1,cz, x0,y1,z0, x1,y1,z1, cx,y1,cz, 0,1,0);
+            const uint32_t cap = uint32_t(mesh.getVertexCount());
+            mesh.addVertex(cx, y1, cz, 0, 1, 0, 0.5f, 0.5f);
+            mesh.addVertex(x1, y1, z1, 0, 1, 0, 0.5f + 0.5f * std::cos(a1),
+                           0.5f + 0.5f * std::sin(a1));
+            mesh.addVertex(x0, y1, z0, 0, 1, 0, 0.5f + 0.5f * std::cos(a0),
+                           0.5f + 0.5f * std::sin(a0));
+            mesh.addTriangle(cap, cap + 1, cap + 2);
         }
     }
 };
diff --git a/test/procgen.cpp b/test/procgen.cpp
index 2bd611ad..bc3f1a05 100644
--- a/test/procgen.cpp
+++ b/test/procgen.cpp
@@ -369,6 +369,28 @@ bool meshNormalsFiniteUnit(const MeshBuild &m, float tol = 0.15f) {
     return true;
 }
 
+bool meshWindingAgreesWithNormals(const MeshBuild &m, float minFraction = 0.9f) {
+    int ok = 0, counted = 0;
+    for (int t = 0; t + 2 < m.getIndexCount(); t += 3) {
+        const int i0 = m.getIndex(t), i1 = m.getIndex(t + 1), i2 = m.getIndex(t + 2);
+        const float ax = m.getPositionX(i1) - m.getPositionX(i0);
+        const float ay = m.getPositionY(i1) - m.getPositionY(i0);
+        const float az = m.getPositionZ(i1) - m.getPositionZ(i0);
+        const float bx = m.getPositionX(i2) - m.getPositionX(i0);
+        const float by = m.getPositionY(i2) - m.getPositionY(i0);
+        const float bz = m.getPositionZ(i2) - m.getPositionZ(i0);
+        const float gx = ay * bz - az * by, gy = az * bx - ax * bz, gz = ax * by - ay * bx;
+        const float gLen = std::sqrt(gx * gx + gy * gy + gz * gz);
+        if (gLen < 1e-8f) continue;
+        const float nx = (m.getNormalX(i0) + m.getNormalX(i1) + m.getNormalX(i2)) / 3.f;
+        const float ny = (m.getNormalY(i0) + m.getNormalY(i1) + m.getNormalY(i2)) / 3.f;
+        const float nz = (m.getNormalZ(i0) + m.getNormalZ(i1) + m.getNormalZ(i2)) / 3.f;
+        ++counted;
+        if (gx * nx + gy * ny + gz * nz > 0.f) ++ok;
+    }
+    return counted > 0 && float(ok) / float(counted) >= minFraction;
+}
+
 bool meshPositionsFinite(const MeshBuild &m) {
     for (int i = 0; i < m.getVertexCount(); ++i) {
         if (!std::isfinite(m.getPositionX(i)) || !std::isfinite(m.getPositionY(i)) ||
@@ -3536,6 +3558,13 @@ TEST_CASE("procgen.mesh.castle.multilevelDeterministicAndComplete") {
     CHECK(stairs->getVertexCount() > 100);
     CHECK_EQ(stairs->getMeta("group", ""), "stairs");
     CHECK(meshIndicesInRange(*stairs));
+    int towerGroup = -1;
+    for (int i = 0; i < a.getGroupCount(); ++i)
+        if (a.getGroupName(i) == "towers") towerGroup = i;
+    REQUIRE(towerGroup >= 0);
+    auto towers = a.copyGroup(towerGroup);
+    REQUIRE(towers.get() != nullptr);
+    CHECK(meshWindingAgreesWithNormals(*towers));
 }
 
 TEST_CASE("procgen.mesh.castle.parametersControlTopologyAndBounds") {