feat(game): merge preview root components

4 files changed, 208 insertions, 64 deletions

diff --git a/README.md b/README.md
index 1fc5784..af1fcf5 100644
--- a/README.md
+++ b/README.md
@@ -27,12 +27,12 @@ Open source проект с реализацией компонентов игр
 - [apps/fparkan-cli](apps/fparkan-cli) — CLI для архивов, графов и acceptance-отчетов.
 - [apps/fparkan-viewer](apps/fparkan-viewer) — inspection-only CLI для archive/model/texture/map без live Vulkan draw path.
 - [apps/fparkan-headless](apps/fparkan-headless) — headless runtime composition root.
-- [apps/fparkan-game](apps/fparkan-game) — mission composition root: по умолчанию выдаёт planning report; opt-in `--backend static-vulkan` использует first-root preview loader и открывает native Vulkan окно для первой MSH-модели выбранного root.
+- [apps/fparkan-game](apps/fparkan-game) — mission composition root: по умолчанию выдаёт planning report; opt-in `--backend static-vulkan` использует first-root preview loader и открывает native Vulkan окно для всех подготовленных MSH-компонентов выбранного root.
 
 ## Текущий статус рендера
 
 - `fparkan-vulkan-smoke` доказывает живой Stage 0 Vulkan triangle path с native window, swapchain и validation telemetry.
-- `VulkanPlanningBackend` и default-режим `fparkan-game` подтверждают только deterministic command planning/capture, а не draw пикселей. `fparkan-game --backend static-vulkan` — узкий mission-to-native-Vulkan bridge: для первого root он загружает первую MAT0 diffuse texture на каждый используемый MSH selector; полный corpus, material phases, transforms и pixel parity ещё не подтверждены.
+- `VulkanPlanningBackend` и default-режим `fparkan-game` подтверждают только deterministic command planning/capture, а не draw пикселей. `fparkan-game --backend static-vulkan` — узкий mission-to-native-Vulkan bridge: для первого root он объединяет все подготовленные MSH-компоненты и загружает первую MAT0 diffuse texture на каждый используемый selector с preview-local remap; полный corpus, material phases, transforms и pixel parity ещё не подтверждены.
 - `fparkan-viewer` пока является инспектором ассетов. `fparkan-vulkan-smoke` имеет live Stage 3 bridge для original `MSH`/`Texm`/`WEAR`/`MAT0` и geometry-only `Land.msh`; полноценный viewer, исходные terrain-material states, camera и pixel parity ещё не закрыты.
 - Truth table и evidence-артефакты вынесены в [`docs/rendering/renderer_truth_table.md`](docs/rendering/renderer_truth_table.md) и [`docs/evidence/`](docs/evidence).
 
diff --git a/apps/fparkan-game/src/main.rs b/apps/fparkan-game/src/main.rs
index 2d4f4a0..286a23e 100644
--- a/apps/fparkan-game/src/main.rs
+++ b/apps/fparkan-game/src/main.rs
@@ -82,10 +82,11 @@ fn run(args: &[String]) -> Result<String, String> {
     if args.backend == RenderBackendMode::StaticVulkan {
         let mission_assets = loaded_mission_assets(&engine)
             .ok_or_else(|| "mission assets are unavailable after loading".to_string())?;
-        let (mesh, materials) = static_preview_mesh_and_materials(mission_assets)?;
+        let preview = static_preview_mesh_and_materials(mission_assets)?;
         return run_static_vulkan_mode(
-            mesh,
-            materials,
+            preview.mesh,
+            preview.materials,
+            preview.mesh_components,
             args.frames,
             &args.mission,
             loaded.object_count,
@@ -177,48 +178,87 @@ fn load_requested_mission(
     .map_err(|err| err.to_string())
 }
 
-/// Projects the explicitly bounded static-preview root into geometry and its
-/// selector-keyed diffuse material descriptors.
+/// Static geometry and descriptors belonging to the first preview root.
+struct StaticPreviewScene {
+    mesh: VulkanStaticMesh,
+    materials: Vec<VulkanStaticMaterial>,
+    mesh_components: usize,
+}
+
+/// Projects every MSH component of the explicitly bounded static-preview root
+/// into one mesh and selector-keyed diffuse material descriptors.
 ///
 /// This intentionally takes only the first MAT0 texture request for each MSH
 /// batch selector. Later material phases, animation, lightmaps, transforms,
 /// and gameplay visibility remain outside this preview bridge.
-fn static_preview_mesh_and_materials(
+fn static_preview_mesh_and_materials(assets: &MissionAssets) -> Result<StaticPreviewScene, String> {
+    let visual_ids = assets.visuals_for_object(0);
+    if visual_ids.is_empty() {
+        return Err("first static preview root has no prepared visuals".to_string());
+    }
+    let mut mesh = VulkanStaticMesh {
+        vertices: Vec::new(),
+        indices: Vec::new(),
+        draw_ranges: Vec::new(),
+    };
+    let mut materials = Vec::new();
+    let mut mesh_components = 0;
+    for visual_id in visual_ids {
+        let visual = assets.visual_by_id(*visual_id).ok_or_else(|| {
+            format!("first static preview root references unknown visual {visual_id:?}")
+        })?;
+        let Some(model_id) = visual.model_id else {
+            continue;
+        };
+        let model = assets.model_by_id(model_id).ok_or_else(|| {
+            format!("static preview visual {visual_id:?} references unknown model {model_id:?}")
+        })?;
+        let component = project_msh_to_static_mesh(&model.validated)
+            .map_err(|err| format!("project mission MSH for Vulkan: {err}"))?;
+        let selector_remap =
+            static_preview_component_materials(assets, visual, &component, &mut materials)?;
+        append_static_preview_component(&mut mesh, component, &selector_remap)?;
+        mesh_components += 1;
+    }
+    if mesh_components == 0 {
+        return Err("first static preview root has no mesh-backed visual".to_string());
+    }
+    Ok(StaticPreviewScene {
+        mesh,
+        materials,
+        mesh_components,
+    })
+}
+
+fn static_preview_component_materials(
     assets: &MissionAssets,
-) -> Result<(VulkanStaticMesh, Vec<VulkanStaticMaterial>), String> {
-    let model = assets.models.first().ok_or_else(|| {
-        "mission has no mesh-backed model for the static Vulkan bridge".to_string()
-    })?;
-    let mesh = project_msh_to_static_mesh(&model.validated)
-        .map_err(|err| format!("project mission MSH for Vulkan: {err}"))?;
-    let visual = assets
-        .visuals
-        .iter()
-        .find(|visual| visual.model_id == Some(model.id))
-        .ok_or_else(|| "static preview model has no prepared visual".to_string())?;
-    let mut selectors = mesh
+    visual: &PreparedVisual,
+    mesh: &VulkanStaticMesh,
+    materials: &mut Vec<VulkanStaticMaterial>,
+) -> Result<Vec<(u16, u16)>, String> {
+    let mut source_selectors = mesh
         .draw_ranges
         .iter()
         .map(|range| range.material_index)
         .collect::<Vec<_>>();
-    selectors.sort_unstable();
-    selectors.dedup();
-
-    let materials = selectors
+    source_selectors.sort_unstable();
+    source_selectors.dedup();
+    source_selectors
         .into_iter()
-        .map(|material_index| {
-            let material_id = visual.material_ids.get(usize::from(material_index)).ok_or_else(|| {
-                format!(
-                    "static preview MSH batch selector {material_index} has no prepared WEAR material"
-                )
-            })?;
+        .map(|source_selector| {
+            let material_id = visual
+                .material_ids
+                .get(usize::from(source_selector))
+                .ok_or_else(|| {
+                    format!(
+                        "static preview MSH batch selector {source_selector} has no prepared WEAR material"
+                    )
+                })?;
             let material = assets.material_by_id(*material_id).ok_or_else(|| {
-                format!(
-                    "static preview prepared material {material_index} is unavailable"
-                )
+                format!("static preview prepared material {source_selector} is unavailable")
             })?;
             let texture_name = material.texture_requests.first().ok_or_else(|| {
-                format!("static preview material {material_index} has no MAT0 diffuse texture")
+                format!("static preview material {source_selector} has no MAT0 diffuse texture")
             })?;
             let texture = assets
                 .textures
@@ -229,25 +269,81 @@ fn static_preview_mesh_and_materials(
                 })
                 .ok_or_else(|| {
                     format!(
-                        "static preview diffuse texture {texture_name:?} for material {material_index} is unavailable"
+                        "static preview diffuse texture {texture_name:?} for material {source_selector} is unavailable"
                     )
                 })?;
             let image = texture.decode_mip_rgba8(0).map_err(|err| {
                 format!(
-                    "decode static preview diffuse texture {texture_name:?} for material {material_index}: {err}"
+                    "decode static preview diffuse texture {texture_name:?} for material {source_selector}: {err}"
                 )
             })?;
-            Ok(VulkanStaticMaterial {
-                material_index,
+            let preview_selector = u16::try_from(materials.len()).map_err(|_| {
+                "static preview exceeds the available 16-bit material selector space".to_string()
+            })?;
+            materials.push(VulkanStaticMaterial {
+                material_index: preview_selector,
                 texture: VulkanStaticTexture {
                     width: image.width,
                     height: image.height,
                     rgba8: image.rgba8,
                 },
-            })
+            });
+            Ok((source_selector, preview_selector))
         })
-        .collect::<Result<Vec<_>, String>>()?;
-    Ok((mesh, materials))
+        .collect()
+}
+
+fn append_static_preview_component(
+    target: &mut VulkanStaticMesh,
+    component: VulkanStaticMesh,
+    selector_remap: &[(u16, u16)],
+) -> Result<(), String> {
+    let vertex_base = u16::try_from(target.vertices.len()).map_err(|_| {
+        "static preview exceeds the available 16-bit vertex index space".to_string()
+    })?;
+    let first_index_base = u32::try_from(target.indices.len())
+        .map_err(|_| "static preview index count exceeds u32".to_string())?;
+    target
+        .vertices
+        .len()
+        .checked_add(component.vertices.len())
+        .filter(|count| *count <= usize::from(u16::MAX) + 1)
+        .ok_or_else(|| {
+            "static preview exceeds the available 16-bit vertex index space".to_string()
+        })?;
+    target.vertices.extend(component.vertices);
+    target.indices.extend(
+        component
+            .indices
+            .into_iter()
+            .map(|index| {
+                index.checked_add(vertex_base).ok_or_else(|| {
+                    "static preview exceeds the available 16-bit vertex index space".to_string()
+                })
+            })
+            .collect::<Result<Vec<_>, _>>()?,
+    );
+    for range in component.draw_ranges {
+        let material_index = selector_remap
+            .iter()
+            .find_map(|(source, preview)| (*source == range.material_index).then_some(*preview))
+            .ok_or_else(|| {
+                format!(
+                    "static preview component has no material remap for selector {}",
+                    range.material_index
+                )
+            })?;
+        target
+            .draw_ranges
+            .push(fparkan_render_vulkan::VulkanStaticDrawRange {
+                first_index: first_index_base
+                    .checked_add(range.first_index)
+                    .ok_or_else(|| "static preview index range exceeds u32".to_string())?,
+                material_index,
+                ..range
+            });
+    }
+    Ok(())
 }
 
 fn prepare_load_progress_path(path: &std::path::Path) -> Result<(), String> {
@@ -264,13 +360,21 @@ fn write_load_progress(path: &std::path::Path, phase: MissionLoadPhase) -> Resul
 fn run_static_vulkan_mode(
     mesh: VulkanStaticMesh,
     materials: Vec<VulkanStaticMaterial>,
+    mesh_components: usize,
     target_frames: u64,
     mission: &str,
     object_count: usize,
 ) -> Result<String, String> {
     let event_loop = EventLoop::new().map_err(|err| format!("winit event loop: {err}"))?;
     event_loop.set_control_flow(ControlFlow::Poll);
-    let mut app = StaticVulkanApp::new(mesh, materials, target_frames, mission, object_count);
+    let mut app = StaticVulkanApp::new(
+        mesh,
+        materials,
+        mesh_components,
+        target_frames,
+        mission,
+        object_count,
+    );
     if let Err(err) = event_loop.run_app(&mut app) {
         app.error = Some(format!("winit event loop: {err}"));
     }
@@ -280,6 +384,7 @@ fn run_static_vulkan_mode(
 struct StaticVulkanApp {
     mesh: VulkanStaticMesh,
     materials: Vec<VulkanStaticMaterial>,
+    mesh_components: usize,
     target_frames: u64,
     mission: String,
     object_count: usize,
@@ -295,6 +400,7 @@ impl StaticVulkanApp {
     fn new(
         mesh: VulkanStaticMesh,
         materials: Vec<VulkanStaticMaterial>,
+        mesh_components: usize,
         target_frames: u64,
         mission: &str,
         object_count: usize,
@@ -302,6 +408,7 @@ impl StaticVulkanApp {
         Self {
             mesh,
             materials,
+            mesh_components,
             target_frames,
             mission: mission.to_string(),
             object_count,
@@ -344,10 +451,11 @@ impl StaticVulkanApp {
             return;
         }
         self.output = Some(format!(
-            "{{\"report_kind\":\"rendered-static-mission\",\"backend\":\"vulkan-static\",\"window\":\"native\",\"mission\":{},\"objects\":{},\"frames\":{},\"material_descriptors\":{},\"swapchain\":[{},{}],\"swapchain_images\":{},\"validation_warnings\":{},\"validation_errors\":{},\"readback_bytes\":{},\"readback_hash\":{}}}",
+            "{{\"report_kind\":\"rendered-static-mission\",\"backend\":\"vulkan-static\",\"window\":\"native\",\"mission\":{},\"objects\":{},\"frames\":{},\"mesh_components\":{},\"material_descriptors\":{},\"swapchain\":[{},{}],\"swapchain_images\":{},\"validation_warnings\":{},\"validation_errors\":{},\"readback_bytes\":{},\"readback_hash\":{}}}",
             json_string(&self.mission),
             self.object_count,
             self.frames_presented,
+            self.mesh_components,
             self.materials.len(),
             report.renderer_report.swapchain_extent.0,
             report.renderer_report.swapchain_extent.1,
@@ -777,6 +885,35 @@ mod tests {
     }
 
     #[test]
+    fn static_preview_component_merge_offsets_indices_and_remaps_local_selectors(
+    ) -> Result<(), String> {
+        let mut merged = VulkanStaticMesh {
+            vertices: Vec::new(),
+            indices: Vec::new(),
+            draw_ranges: Vec::new(),
+        };
+        append_static_preview_component(
+            &mut merged,
+            VulkanStaticMesh::smoke_triangle(),
+            &[(0, 4)],
+        )?;
+        append_static_preview_component(
+            &mut merged,
+            VulkanStaticMesh::smoke_triangle(),
+            &[(0, 9)],
+        )?;
+
+        assert_eq!(merged.vertices.len(), 6);
+        assert_eq!(merged.indices, vec![0, 1, 2, 3, 4, 5]);
+        assert_eq!(merged.draw_ranges.len(), 2);
+        assert_eq!(merged.draw_ranges[0].first_index, 0);
+        assert_eq!(merged.draw_ranges[0].material_index, 4);
+        assert_eq!(merged.draw_ranges[1].first_index, 3);
+        assert_eq!(merged.draw_ranges[1].material_index, 9);
+        Ok(())
+    }
+
+    #[test]
     fn render_commands_follow_snapshot_order() -> Result<(), String> {
         let snapshot = WorldSnapshot {
             tick: Tick(7),
diff --git a/docs/rendering/renderer_truth_table.md b/docs/rendering/renderer_truth_table.md
index 0700dbb..2e3449f 100644
--- a/docs/rendering/renderer_truth_table.md
+++ b/docs/rendering/renderer_truth_table.md
@@ -13,7 +13,7 @@
 | `RecordingBackend` | No | No | Optional CPU-side IDs only | `covered-planning` | Stable command capture for backend-neutral tests | Native window, Vulkan, GPU resource lifetime, pixels |
 | `NullBackend` | No | No | Optional CPU-side IDs only | Usually `covered` for validation-only rows | Command stream framing and bounds validation | Capture stability, GPU execution, pixels |
 | `VulkanAssetRenderer` | Yes | Yes | Yes | `covered-gpu` | Static original asset rendering: MSH/Texm/WEAR/MAT0/terrain through Vulkan | Animation/FX parity unless explicitly wired |
-| `fparkan-game --backend static-vulkan` | Yes, GOG `Autodemo.00` | Yes, static MSH draw | First MSH from first mission root; first MAT0 diffuse TEXM per used selector | `covered-gpu` only for the narrow static-preview bridge | Opt-in mission-to-native-window bootstrap, static MSH projection, selector-keyed diffuse descriptor upload and synchronized teardown telemetry | Full mission scene, later MAT0 phases/animation, lightmaps, placed transforms/orientation, camera, gameplay, original-runtime parity |
+| `fparkan-game --backend static-vulkan` | Yes, GOG/Part 1/Part 2 `Autodemo.00` | Yes, merged static MSH component draws | All prepared MSH components from first mission root; first MAT0 diffuse TEXM per source selector | `covered-gpu` only for the narrow static-preview bridge | Opt-in mission-to-native-window bootstrap, component mesh merge, preview-local selector remap, diffuse descriptor upload and synchronized teardown telemetry | Full mission scene, later MAT0 phases/animation, lightmaps, placed transforms/orientation, camera, gameplay, original-runtime parity |
 | Future rendered `fparkan-game` mode | Yes | Yes | Yes | `covered-gpu` plus original-evidence IDs | Mission-driven render snapshot execution and pixel capture | Original-runtime parity for animation/FX/x87 without dedicated captures |
 
 ## Rules
@@ -34,17 +34,19 @@
 - Lightmap остаётся отдельным, не реализованным contract: оригинальный `World3D.dll` экспортирует самостоятельный `SetLightMapLib` наряду с `SetTexturesLib` и `SetMaterialLib`; WEAR содержит независимый блок `LIGHTMAPS`. Текущая документация не подтверждает связь этих slots с `Batch20.material_index` или их UV/channel semantics, поэтому viewer не подменяет lightmap diffuse texture и не добавляет недоказанное binding.
 - `apps/fparkan-game` по умолчанию выдает `render-planning` JSON report поверх
   synthetic window descriptor и `VulkanPlanningBackend`. Opt-in `--backend static-vulkan`
-  уже создаёт native `winit` window и передаёт первую подготовленную MSH модели миссии в
-  `VulkanSmokeRenderer` вместе с первым diffuse TEXM из MAT0 для каждого реально используемого
-  `Batch20.material_index`. Режим использует
+  уже создаёт native `winit` window и передаёт все подготовленные MSH-компоненты первого root в
+  `VulkanSmokeRenderer`. Каждый исходный `Batch20.material_index` сначала разрешается внутри
+  собственного WEAR/MAT0 visual, затем получает уникальный preview-local selector и первый
+  diffuse TEXM. Режим использует
   отдельный first-root preview loader: normal `load_mission` по-прежнему готовит все reachable
   assets и весь graph, тогда как preview строит graph и готовит assets только для первого
   mission root. `--load-progress <file>` writes the last entered loader phase synchronously for
   timeout diagnosis. Fresh GOG `MISSIONS/Autodemo.00/data.tma` run passed in 38.7 seconds with
-  one presented frame, native 1280×720 swapchain (2 images), one original diffuse material
-  descriptor, 7,372,800-byte readback hash `12332214764918703197`, and validation
-  warnings/errors `0/0`. This is `covered-gpu` evidence for that narrow static-preview bridge
-  only, not full-scene or original-renderer parity.
+  one presented frame, native 1280×720 swapchain (2 images), 14 mesh components and 14 original
+  diffuse material descriptors, 7,372,800-byte readback hash `16595193636416981301`, and
+  validation warnings/errors `0/0`. Part 1 matches that artifact; Part 2 passes validation with
+  14/14 but has a distinct hash `18268338333658342130`. This is `covered-gpu` evidence for that
+  narrow static-preview bridge only, not full-scene or original-renderer parity.
 - `apps/fparkan-viewer` сейчас inspection-only CLI и не открывает live Vulkan
   asset viewer.
 - Следующий реальный milestone для rendered acceptance: `VulkanAssetRenderer`
diff --git a/docs/tomes/05-render.md b/docs/tomes/05-render.md
index e7b122c..c8cd055 100644
--- a/docs/tomes/05-render.md
+++ b/docs/tomes/05-render.md
@@ -938,33 +938,38 @@ from a runtime slot or draw order.
 
 `fparkan-game --backend static-vulkan` is an explicit native-window experiment,
 not the default planning path. It visits only the first mission root, selects
-its prepared MSH model, sends it through the existing static XZ clip-space
-projection and renders a requested number of frames through
+every prepared MSH component of that root, merges their static XZ clip-space
+geometry, and renders a requested number of frames through
 `VulkanSmokeRenderer`; teardown rejects validation warnings/errors and reports
 swapchain/readback telemetry. For each used `Batch20.material_index`, it resolves
 the positional prepared WEAR material and uploads mip 0 of that material's first
-MAT0 diffuse texture request as a selector-keyed descriptor.
+MAT0 diffuse texture request. Because `material_index` is local to an MSH/WEAR
+component, the merged preview assigns a unique preview-local selector only after
+this source resolution; it does not falsely treat equal local indexes as equal
+materials.
 
 This is a narrow bootstrap from mission assets to a live Vulkan renderer. It
 does not render every placed object, apply TMA transforms or orientation, select
 later MAT0 phases or animation, bind lightmaps, or establish a game camera. Fresh GOG
 `MISSIONS/Autodemo.00/data.tma` evidence now proves the narrow GPU bridge: one
-presented frame completed in 38.7 seconds with a native 1280×720 two-image
-swapchain, one selector-keyed original diffuse descriptor, 7,372,800-byte
-synchronized readback (FNV-1a `12332214764918703197`) and validation
+presented frame completed in 39.6 seconds with a native 1280×720 two-image
+swapchain, 14 merged mesh components and 14 selector-keyed original diffuse
+descriptors, 7,372,800-byte synchronized readback (FNV-1a
+`16595193636416981301`) and validation
 warnings/errors `0/0`. This is not a
 full-scene or original-renderer pixel-parity claim.
 
 The same bounded command was then run against the licensed installed Part 1
 (`C:\\Program Files (x86)\\Nikita\\IS`) and Part 2
 (`C:\\Program Files (x86)\\Nikita\\IS2`) corpora supplied for testing. Both
-`MISSIONS/Autodemo.00/data.tma` runs completed with the same one-material,
-1280×720 two-image report, the same `12332214764918703197` readback hash and
-validation warnings/errors `0/0`; Part 1 took 28.5 seconds and Part 2 took
-94.5 seconds. Part 2's synchronous checkpoint was `Graph` while it was still
-loading, so the longer startup is not attributed to Vulkan. This is only a
-cross-corpus confirmation of the first-root static-preview bridge, not a claim
-that the two games' full mission renderers are compatible.
+`MISSIONS/Autodemo.00/data.tma` runs completed with 14 mesh components and 14
+original diffuse descriptors. Part 1 took 28.2 seconds and matched the GOG
+readback hash `16595193636416981301`; Part 2 took 93.6 seconds and remained
+validation-clean but produced distinct hash `18268338333658342130`. Part 2's
+synchronous checkpoint was `Graph` while it was still loading, so the longer
+startup is not attributed to Vulkan. This is only a cross-corpus confirmation
+of the first-root static-preview bridge, not a claim that the two games' full
+mission renderers are compatible.
 
 The preview now asks `load_mission_static_preview` for both graph and assets.
 Normal mission loading remains full and transactional; preview graph traversal