diff --git a/crates/engine/src/cmd/file.rs b/crates/engine/src/cmd/file.rs
index 890a9def1..d0158a286 100644
--- a/crates/engine/src/cmd/file.rs
+++ b/crates/engine/src/cmd/file.rs
@@ -319,15 +319,19 @@ impl Prober {
             return f.map(|footage| Probed { name, footage, ask_alpha: false, warning: None }).map_err(fail);
         }
         let importer = self.importer.as_ref().ok_or_else(|| fail("media import is not available in this build".into()))?;
-        let mut f = crate::sequence::probe(importer.as_ref(), src, self.sequence_rate).map_err(fail)?;
-        let mut warning = None;
+        // What the file's own import left out (a model's textures over the limits) is a warning too.
+        let (mut f, mut warning) = match src {
+            Source::File(_) => importer.probe_noting(path).map_err(fail)?,
+            _ => (crate::sequence::probe(importer.as_ref(), src, self.sequence_rate).map_err(fail)?, None),
+        };
         // Settings ▸ Import ▸ Report Missing Frames (numbered sequences).
         if f.kind == FootageKind::Sequence
             && !f.alphabetical
             && self.report_missing_frames
             && let Some(gaps) = crate::sequence::missing_report(&f.sequence)
         {
-            warning = Some(format!("{name}: {gaps} (the previous frame is held)"));
+            let gaps = format!("{name}: {gaps} (the previous frame is held)");
+            warning = Some(warning.map_or(gaps.clone(), |w| format!("{w}; {gaps}")));
         }
         // Settings ▸ Import ▸ Interpret Unlabeled Alpha As: images only (a 3D model renders its
         // own alpha, and audio and data have none).
diff --git a/crates/engine/src/services.rs b/crates/engine/src/services.rs
index 5658df107..fe95f5300 100644
--- a/crates/engine/src/services.rs
+++ b/crates/engine/src/services.rs
@@ -106,6 +106,11 @@ pub trait Importer: Send + Sync {
     /// Probe one file and return footage metadata. Image sequences are the engine's
     /// ([`sequence`]): it groups numbered stills and probes their first file here.
     fn probe(&self, path: &str) -> std::result::Result<effectcraft_project::Footage, String>;
+    /// [`probe`](Self::probe), and what the import left out of the file (a 3D model's textures
+    /// over the limits), which the import shows the user.
+    fn probe_noting(&self, path: &str) -> std::result::Result<(effectcraft_project::Footage, Option<String>), String> {
+        self.probe(path).map(|f| (f, None))
+    }
     /// A footage file's bytes are now at `path` (extracted from a template): hosts whose media
     /// layer reads from memory (the browser) register them; file-based ones need nothing.
     fn register(&self, _path: &str, _data: &[u8]) {}
diff --git a/crates/engine/src/tests/session.rs b/crates/engine/src/tests/session.rs
index b253640e7..020c2daf0 100644
--- a/crates/engine/src/tests/session.rs
+++ b/crates/engine/src/tests/session.rs
@@ -96,6 +96,25 @@ fn imported_files_go_into_the_comp_where_they_were_dropped() {
     assert!(s.execute("layer.addItem", json!({"item": "a.png", "position": [1.0]})).is_err(), "position needs x and y");
 }
 
+/// What an import left out of a file (a 3D model's textures over the limits) comes back in the
+/// import's `warnings`.
+#[test]
+fn what_an_import_left_out_is_a_warning() {
+    use effectcraft_project::{Footage, FootageKind};
+    struct Probe;
+    impl crate::Importer for Probe {
+        fn probe(&self, path: &str) -> Result<Footage, String> {
+            Ok(Footage { path: path.into(), kind: FootageKind::Model, ..Default::default() })
+        }
+        fn probe_noting(&self, path: &str) -> Result<(Footage, Option<String>), String> {
+            Ok((self.probe(path)?, Some(format!("{path}: texture `a.png` left out"))))
+        }
+    }
+    let mut s = Session { importer: Some(std::sync::Arc::new(Probe)), ..Default::default() };
+    let r = s.execute("file.import", json!({"paths": ["/m/scene.obj"]})).unwrap();
+    assert_eq!(r["warnings"], json!(["/m/scene.obj: texture `a.png` left out"]));
+}
+
 /// #270: files dropped or picked in the Import dialog (`file.import {background}`) are probed in
 /// a background job that says which file it is reading and how many are left; then they arrive
 /// in one undo step, all selected, with a count. The same file imported again arrives again.
diff --git a/crates/host/src/lib.rs b/crates/host/src/lib.rs
index 843a06123..7212fd730 100644
--- a/crates/host/src/lib.rs
+++ b/crates/host/src/lib.rs
@@ -20,6 +20,9 @@ impl Importer for MediaImporter {
     fn probe(&self, path: &str) -> Result<Footage, String> {
         effectcraft_media::probe(path).map_err(|e| e.to_string())
     }
+    fn probe_noting(&self, path: &str) -> Result<(Footage, Option<String>), String> {
+        effectcraft_media::probe_noting(path).map_err(|e| e.to_string())
+    }
 }
 
 /// Render Queue export via `effectcraft-export`: to the file system, or to `sink` (the web app
diff --git a/crates/media/src/lib.rs b/crates/media/src/lib.rs
index 0b509c45f..454c3705f 100644
--- a/crates/media/src/lib.rs
+++ b/crates/media/src/lib.rs
@@ -33,7 +33,7 @@ mod webp_anim;
 /// Video decoder counters (time in decoders, samples decoded, seeks, cache hits), for benchmarks.
 pub use filmcraft_codecs::{GopStats, gop_stats};
 pub use pool::{DEFAULT_BUDGET, MediaPool, PoolStats};
-pub use probe::{DEFAULT_SEQUENCE_RATE, probe, probe_bytes, probe_model};
+pub use probe::{DEFAULT_SEQUENCE_RATE, probe, probe_bytes, probe_model, probe_noting};
 
 /// Errors from probing or decoding footage.
 #[derive(Debug, thiserror::Error)]
diff --git a/crates/media/src/probe.rs b/crates/media/src/probe.rs
index 2c7b2a402..2a734b7d5 100644
--- a/crates/media/src/probe.rs
+++ b/crates/media/src/probe.rs
@@ -43,11 +43,25 @@ fn side_file_reader(model: &Path) -> impl Fn(&str) -> Option<Vec<u8>> + use<> {
     }
 }
 
+thread_local! {
+    /// What the last model probed on this thread left out (see [`probe_noting`]).
+    static MODEL_WARNING: std::cell::RefCell<Option<String>> = const { std::cell::RefCell::new(None) };
+}
+
+/// [`probe`], and what the import left out of the file (a 3D model's textures over the limits),
+/// for the user.
+pub fn probe_noting(path: impl AsRef<Path>) -> Result<(Footage, Option<String>)> {
+    MODEL_WARNING.with(|w| w.borrow_mut().take());
+    let f = probe(path)?;
+    Ok((f, MODEL_WARNING.with(|w| w.borrow_mut().take())))
+}
+
 /// Probe a 3D model (glTF 2.0 / OBJ / STL / FBX): a [`FootageKind::Model`] item whose duration is its
 /// longest animation. `resolve` reads sibling resources.
 pub fn probe_model(path: &str, bytes: &[u8], resolve: &dyn Fn(&str) -> Option<Vec<u8>>) -> Result<Footage> {
     let m = effectcraft_model::load(path, bytes, resolve).map_err(|e| MediaError::Decode(format!("{path}: {e}")))?;
     let s = m.summary();
+    MODEL_WARNING.with(|w| *w.borrow_mut() = (!m.warnings.is_empty()).then(|| format!("{path}: {}", m.warnings.join("; "))));
     let dur = s.animations.iter().map(|a| a.1).fold(0.0f64, f64::max);
     let codec = match effectcraft_model::format_of(path) {
         Some("obj") => "OBJ",
diff --git a/crates/model/src/gltf.rs b/crates/model/src/gltf.rs
index c0b736359..79dab1ddc 100644
--- a/crates/model/src/gltf.rs
+++ b/crates/model/src/gltf.rs
@@ -536,7 +536,7 @@ pub(crate) fn parse_with_budget(bytes: &[u8], resolve: &dyn Fn(&str) -> Option<V
         .and_then(|e| e.get("KHR_lights_punctual"))
         .map(|e| arr(e, "lights").iter().enumerate().map(|(i, l)| light(l, i)).collect())
         .unwrap_or_default();
-    Ok(Model { meshes, nodes, roots, materials, textures, skins, animations, cameras, lights })
+    Ok(Model { meshes, nodes, roots, materials, textures, skins, animations, cameras, lights, warnings: Vec::new() })
 }
 
 fn name_or(v: &Value, d: String) -> String {
diff --git a/crates/model/src/lib.rs b/crates/model/src/lib.rs
index 19a0d37f3..2a7374a05 100644
--- a/crates/model/src/lib.rs
+++ b/crates/model/src/lib.rs
@@ -68,6 +68,11 @@ impl Texture {
     pub fn solid(c: [f32; 4]) -> Texture {
         Texture { width: 1, height: 1, data: vec![c], wrap: [Wrap::Repeat; 2] }
     }
+    /// The pixel size an image claims, read from its header without decoding it.
+    pub fn dimensions(bytes: &[u8]) -> Result<(u32, u32)> {
+        let reader = image::ImageReader::new(std::io::Cursor::new(bytes)).with_guessed_format().map_err(|e| perr(format!("image: {e}")))?;
+        reader.into_dimensions().map_err(|e| perr(format!("image: {e}")))
+    }
     /// Decode a PNG or JPEG.
     pub fn decode(bytes: &[u8]) -> Result<Texture> {
         let img = image::load_from_memory(bytes).map_err(|e| perr(format!("image: {e}")))?.to_rgba32f();
@@ -512,6 +517,8 @@ pub struct Model {
     pub cameras: Vec<ModelCamera>,
     /// Punctual lights embedded in the file (glTF `KHR_lights_punctual`).
     pub lights: Vec<ModelLight>,
+    /// Parts of the file the import left out (textures over the limits), for the user.
+    pub warnings: Vec<String>,
 }
 
 /// A camera embedded in a model file.