diff --git a/crates/engine/src/tests.rs b/crates/engine/src/tests.rs
index 311c8264..d3c361c9 100644
--- a/crates/engine/src/tests.rs
+++ b/crates/engine/src/tests.rs
@@ -3660,6 +3660,25 @@ fn opening_a_file_caps_absurd_effect_sizes() {
                 r.props.glow = glow.clone();
             }
         }
+        // Inherited styles too: the deck default, a master's body style, a text box's own list
+        // style, and the theme's effect styles that shape styles point at.
+        let level = deckcraft_model::text::LevelStyle {
+            run: deckcraft_model::text::RunProps {
+                glow: Some(Glow { color: deckcraft_model::style::ColorRef::rgb(deckcraft_color::Rgba::BLACK), radius: huge }),
+                ..Default::default()
+            },
+            ..Default::default()
+        };
+        doc.default_text_style.set(0, level.clone());
+        let m = std::sync::Arc::make_mut(&mut doc.masters[0]);
+        m.body_style.set(0, level.clone());
+        if let Some(fx) = m.theme.format.effects.first_mut() {
+            fx.glow = Some(Glow { color: deckcraft_model::style::ColorRef::rgb(deckcraft_color::Rgba::BLACK), radius: huge });
+        }
+        let list = crate::shapes_mut(doc, sel).unwrap();
+        if let Some(t) = list.iter_mut().find_map(|sh| sh.text.as_mut()) {
+            t.list_style.set(0, level);
+        }
         Ok(())
     })
     .unwrap();
@@ -3689,6 +3708,16 @@ fn opening_a_file_caps_absurd_effect_sizes() {
                 glows.extend(cells.flat_map(|p| p.runs.iter()).filter_map(|r| r.props.glow.as_ref().map(|g| g.radius)));
             }
         });
+        let inherited = |ls: &deckcraft_model::text::ListStyle| {
+            ls.levels.iter().flatten().filter_map(|l| l.run.glow.as_ref().map(|g| g.radius)).collect::<Vec<_>>()
+        };
+        glows.extend(inherited(&st.doc.default_text_style));
+        let m = &st.doc.masters[0];
+        for ls in [&m.title_style, &m.body_style, &m.other_style] {
+            glows.extend(inherited(ls));
+        }
+        glows.extend(m.theme.format.effects.iter().filter_map(|e| e.glow.as_ref().map(|g| g.radius)));
+        deckcraft_model::walk(&slide.shapes, &mut |sh, _| glows.extend(sh.text.iter().flat_map(|t| inherited(&t.list_style))));
         assert!(!glows.is_empty(), "{format}: the glows were kept");
         assert!(glows.iter().all(|g| (0.0..=150.0).contains(g)), "{format}: {glows:?}");
         // Capped, the slide renders (checked last: uncapped, this is what ran out of memory).
diff --git a/crates/format/src/lib.rs b/crates/format/src/lib.rs
index 9a619d5b..fd2a9216 100644
--- a/crates/format/src/lib.rs
+++ b/crates/format/src/lib.rs
@@ -392,6 +392,13 @@ fn sane_reflection(r: &mut deckcraft_model::style::Reflection) {
     r.dist = effect_size(r.dist, MAX_REFLECTION);
 }
 
+/// Run properties a list style hands down to the text that inherits it.
+fn sane_list_style(ls: &mut deckcraft_model::text::ListStyle) {
+    for level in ls.levels.iter_mut().flatten() {
+        sane_run(&mut level.run);
+    }
+}
+
 fn sane_effects(e: &mut deckcraft_model::Effects) {
     for s in e.outer_shadow.iter_mut().chain(e.inner_shadow.iter_mut()) {
         sane_shadow(s);
@@ -420,6 +427,7 @@ fn sane_shapes(shapes: &mut [deckcraft_model::Shape], depth: usize) {
             sane_effects(e);
         }
         if let Some(t) = sh.text.as_mut() {
+            sane_list_style(&mut t.list_style);
             for para in &mut t.paragraphs {
                 sane_run(&mut para.end_props);
                 for r in &mut para.runs {
@@ -438,6 +446,9 @@ fn sane_shapes(shapes: &mut [deckcraft_model::Shape], depth: usize) {
                 sane_shapes(children, depth + 1);
             }
             deckcraft_model::ShapeKind::Table(t) => {
+                for cell in t.rows.iter_mut().flat_map(|r| r.cells.iter_mut()) {
+                    sane_list_style(&mut cell.text.list_style);
+                }
                 for para in t.rows.iter_mut().flat_map(|r| r.cells.iter_mut()).flat_map(|c| c.text.paragraphs.iter_mut()) {
                     sane_run(&mut para.end_props);
                     for r in &mut para.runs {
@@ -459,12 +470,21 @@ pub fn sane_numbers(p: &mut Presentation) {
             *slide = Arc::new(fixed);
         }
     }
+    // What text and shapes inherit: the deck's default text style, each master's title, body and
+    // other styles, and the theme's effect styles that shape styles point at.
+    sane_list_style(&mut p.default_text_style);
     for m in p.masters.iter_mut().chain(p.notes_master.iter_mut()).chain(p.handout_master.iter_mut()) {
         let mut fixed = (**m).clone();
         sane_shapes(&mut fixed.shapes, 0);
         for l in &mut fixed.layouts {
             sane_shapes(&mut l.shapes, 0);
         }
+        for ls in [&mut fixed.title_style, &mut fixed.body_style, &mut fixed.other_style] {
+            sane_list_style(ls);
+        }
+        for e in &mut fixed.theme.format.effects {
+            sane_effects(e);
+        }
         if fixed != **m {
             *m = Arc::new(fixed);
         }