diff --git a/modules/rsplat/components/folk-splat-viewer.ts b/modules/rsplat/components/folk-splat-viewer.ts
index 22ce55b..0ac6121 100644
--- a/modules/rsplat/components/folk-splat-viewer.ts
+++ b/modules/rsplat/components/folk-splat-viewer.ts
@@ -791,7 +791,7 @@ export class FolkSplatViewer extends HTMLElement {
     // Download handler
     this.querySelector("#splat-download-btn")?.addEventListener("click", () => this.downloadModel());
 
-    this.initThreeViewer();
+    requestAnimationFrame(() => this.initThreeViewer());
   }
 
   private async downloadModel() {
@@ -997,8 +997,12 @@ export class FolkSplatViewer extends HTMLElement {
     const { OrbitControls } = await import("three/addons/controls/OrbitControls.js");
     const { GLTFLoader } = await import("three/addons/loaders/GLTFLoader.js");
 
-    const w = container.clientWidth || 800;
-    const h = container.clientHeight || 600;
+    // Wait for layout if container has no dimensions yet
+    if (!container.clientWidth || !container.clientHeight) {
+      await new Promise((r) => requestAnimationFrame(r));
+    }
+    const w = container.clientWidth || window.innerWidth;
+    const h = container.clientHeight || (window.innerHeight - 56);
 
     const scene = new THREE.Scene();
     scene.background = new THREE.Color(0x0f0f14);
diff --git a/server/index.ts b/server/index.ts
index ca50c29..1c37130 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -196,7 +196,7 @@ app.get("/data/files/generated/:filename", async (c) => {
 	const file = Bun.file(filePath);
 	if (!(await file.exists())) return c.notFound();
 	const ext = filename.split(".").pop() || "";
-	const mimeMap: Record<string, string> = { png: "image/png", jpg: "image/jpeg", jpeg: "image/jpeg", webp: "image/webp" };
+	const mimeMap: Record<string, string> = { png: "image/png", jpg: "image/jpeg", jpeg: "image/jpeg", webp: "image/webp", glb: "model/gltf-binary", gltf: "model/gltf+json" };
 	return new Response(file, { headers: { "Content-Type": mimeMap[ext] || "application/octet-stream", "Cache-Control": "public, max-age=86400" } });
 });