diff --git a/crates/engine/src/cmd/object.rs b/crates/engine/src/cmd/object.rs
index bbd159151..bd71c073e 100644
--- a/crates/engine/src/cmd/object.rs
+++ b/crates/engine/src/cmd/object.rs
@@ -459,7 +459,7 @@ pub(crate) fn preview_copies(s: &mut Session, roots: &[NodeId], with_guides: boo
     if let Some(k) = &it.copies
         && Arc::ptr_eq(&k.from, &it.doc)
         && k.roots == roots
-        && (!k.selection.guides.is_empty() == has_guide_copies)
+        && (k.selection.guides.is_empty() != has_guide_copies)
     {
         return Ok(Some(k.clone()));
     }
diff --git a/crates/render/src/fx.rs b/crates/render/src/fx.rs
index f5281fb47..3082d49aa 100644
--- a/crates/render/src/fx.rs
+++ b/crates/render/src/fx.rs
@@ -879,7 +879,7 @@ impl Renderer {
         off.flush();
         let mut pm = vello_cpu::Pixmap::new(w, h);
         off.render(&mut pm, &mut self.resources);
-        if !self.shadows.get(&old).is_some_and(|e| silhouette(&pm, colored) == e.made.pixels) {
+        if self.shadows.get(&old).is_none_or(|e| silhouette(&pm, colored) != e.made.pixels) {
             return;
         }
         if let Some(mut e) = self.shadows.remove(&old) {
diff --git a/crates/trace/tests/shared_boundaries.rs b/crates/trace/tests/shared_boundaries.rs
index 926ecd067..9210c5a80 100644
--- a/crates/trace/tests/shared_boundaries.rs
+++ b/crates/trace/tests/shared_boundaries.rs
@@ -270,7 +270,7 @@ fn variants(art: &Art, n: usize, soft: bool, settings: &[Setting]) -> Vec<String
         for &(name, set) in settings {
             let mut params = params.clone();
             set(&mut params);
-            let expect = (!soft && !(tiny && name == LOOSEST.0)).then_some(counts.as_slice());
+            let expect = (!(soft || tiny && name == LOOSEST.0)).then_some(counts.as_slice());
             let (line, w) = run(art, soft, bw, &params, name, expect);
             println!("{line}");
             wrong.extend(w);
diff --git a/crates/ui-egui/src/i18n/cs.tsv b/crates/ui-egui/src/i18n/cs.tsv
index b289026ba..c82dac4bd 100644
--- a/crates/ui-egui/src/i18n/cs.tsv
+++ b/crates/ui-egui/src/i18n/cs.tsv
@@ -4999,3 +4999,5 @@ mark-style	Japanese	Japonské
 	Movie Clip	Filmový klip
 @msg	name is empty	název je prázdný
 @msg	no symbol named `{n}`	žádný symbol s názvem `{n}`
+@msg	a mask has more than one art block	maska má více než jeden blok kresby
+@msg	mask art ends outside a mask dictionary	kresba masky končí mimo slovník masky
diff --git a/crates/ui-egui/src/i18n/de.tsv b/crates/ui-egui/src/i18n/de.tsv
index 0dd943820..4dab81245 100644
--- a/crates/ui-egui/src/i18n/de.tsv
+++ b/crates/ui-egui/src/i18n/de.tsv
@@ -4536,3 +4536,5 @@ theme	Appearance	Erscheinungsbild
 	Movie Clip	Movieclip
 @msg	name is empty	Name ist leer
 @msg	no symbol named `{n}`	kein Symbol namens `{n}`
+@msg	a mask has more than one art block	eine Maske enthält mehr als einen Grafikblock
+@msg	mask art ends outside a mask dictionary	die Maskengrafik endet außerhalb eines Maskenwörterbuchs
diff --git a/crates/ui-egui/src/i18n/el.tsv b/crates/ui-egui/src/i18n/el.tsv
index 56703aea0..7a7faf3ef 100644
--- a/crates/ui-egui/src/i18n/el.tsv
+++ b/crates/ui-egui/src/i18n/el.tsv
@@ -4951,3 +4951,5 @@ effect	Points	Σημεία
 	Movie Clip	Κλιπ ταινίας
 @msg	name is empty	το όνομα είναι κενό
 @msg	no symbol named `{n}`	κανένα σύμβολο με όνομα `{n}`
+@msg	a mask has more than one art block	η μάσκα έχει περισσότερα από ένα μπλοκ γραφικών
+@msg	mask art ends outside a mask dictionary	τα γραφικά της μάσκας τελειώνουν έξω από το λεξικό της μάσκας
diff --git a/crates/ui-egui/src/i18n/es.tsv b/crates/ui-egui/src/i18n/es.tsv
index 4c6b07cb3..5b9a77e07 100644
--- a/crates/ui-egui/src/i18n/es.tsv
+++ b/crates/ui-egui/src/i18n/es.tsv
@@ -4941,3 +4941,5 @@ mark-style	Japanese	Japonesas
 	Movie Clip	Clip de película
 @msg	name is empty	el nombre está vacío
 @msg	no symbol named `{n}`	no hay ningún símbolo llamado `{n}`
+@msg	a mask has more than one art block	una máscara tiene más de un bloque de ilustración
+@msg	mask art ends outside a mask dictionary	la ilustración de la máscara termina fuera de un diccionario de máscara
diff --git a/crates/ui-egui/src/i18n/fi.tsv b/crates/ui-egui/src/i18n/fi.tsv
index f2750d8a0..c56c95af8 100644
--- a/crates/ui-egui/src/i18n/fi.tsv
+++ b/crates/ui-egui/src/i18n/fi.tsv
@@ -4963,3 +4963,5 @@ mark-style	Japanese	Japanilainen
 	Movie Clip	Elokuvaleike
 @msg	name is empty	nimi on tyhjä
 @msg	no symbol named `{n}`	symbolia nimeltä `{n}` ei ole
+@msg	a mask has more than one art block	maskissa on useampi kuin yksi grafiikkalohko
+@msg	mask art ends outside a mask dictionary	maskin grafiikka päättyy maskin sanakirjan ulkopuolelle
diff --git a/crates/ui-egui/src/i18n/fr.tsv b/crates/ui-egui/src/i18n/fr.tsv
index 03146f17a..747fdce72 100644
--- a/crates/ui-egui/src/i18n/fr.tsv
+++ b/crates/ui-egui/src/i18n/fr.tsv
@@ -4998,3 +4998,5 @@ theme	Appearance	Apparence
 	Movie Clip	Clip
 @msg	name is empty	le nom est vide
 @msg	no symbol named `{n}`	aucun symbole nommé `{n}`
+@msg	a mask has more than one art block	un masque contient plusieurs blocs graphiques
+@msg	mask art ends outside a mask dictionary	les éléments graphiques du masque se terminent en dehors d’un dictionnaire de masque
diff --git a/crates/ui-egui/src/i18n/hu.tsv b/crates/ui-egui/src/i18n/hu.tsv
index 461070dcf..d3de3b4f7 100644
--- a/crates/ui-egui/src/i18n/hu.tsv
+++ b/crates/ui-egui/src/i18n/hu.tsv
@@ -4966,3 +4966,5 @@ imageTrace	Outline	Körvonal
 	Movie Clip	Mozgóklip
 @msg	name is empty	a név üres
 @msg	no symbol named `{n}`	nincs `{n}` nevű szimbólum
+@msg	a mask has more than one art block	egy maszk egynél több grafikai blokkot tartalmaz
+@msg	mask art ends outside a mask dictionary	a maszk grafikája a maszk szótárán kívül ér véget
diff --git a/crates/ui-egui/src/i18n/it.tsv b/crates/ui-egui/src/i18n/it.tsv
index 21cfcf18a..cf158f674 100644
--- a/crates/ui-egui/src/i18n/it.tsv
+++ b/crates/ui-egui/src/i18n/it.tsv
@@ -4576,3 +4576,5 @@ lighting	Light	Luce
 	Movie Clip	Clip filmato
 @msg	name is empty	il nome è vuoto
 @msg	no symbol named `{n}`	nessun simbolo denominato `{n}`
+@msg	a mask has more than one art block	una maschera contiene più di un blocco grafico
+@msg	mask art ends outside a mask dictionary	la grafica della maschera termina fuori da un dizionario di maschera
diff --git a/crates/ui-egui/src/i18n/ja.tsv b/crates/ui-egui/src/i18n/ja.tsv
index 525c112f4..1e7363b0d 100644
--- a/crates/ui-egui/src/i18n/ja.tsv
+++ b/crates/ui-egui/src/i18n/ja.tsv
@@ -4617,3 +4617,5 @@ lighting	Light	ライト
 	Movie Clip	ムービークリップ
 @msg	name is empty	名前が空です
 @msg	no symbol named `{n}`	`{n}` という名前のシンボルはありません
+@msg	a mask has more than one art block	マスクに複数のアートブロックがあります
+@msg	mask art ends outside a mask dictionary	マスクのアートがマスク辞書の外で終わっています
diff --git a/crates/ui-egui/src/i18n/ko.tsv b/crates/ui-egui/src/i18n/ko.tsv
index 6443cfcc4..f344bd74d 100644
--- a/crates/ui-egui/src/i18n/ko.tsv
+++ b/crates/ui-egui/src/i18n/ko.tsv
@@ -4540,3 +4540,5 @@ lighting	Light	광원
 	Movie Clip	무비 클립
 @msg	name is empty	이름이 비어 있습니다
 @msg	no symbol named `{n}`	이름이 `{n}`인 심볼이 없습니다
+@msg	a mask has more than one art block	마스크에 아트 블록이 두 개 이상 있습니다
+@msg	mask art ends outside a mask dictionary	마스크 아트가 마스크 사전 밖에서 끝납니다
diff --git a/crates/ui-egui/src/i18n/pl.tsv b/crates/ui-egui/src/i18n/pl.tsv
index ae9765d1d..f393772ab 100644
--- a/crates/ui-egui/src/i18n/pl.tsv
+++ b/crates/ui-egui/src/i18n/pl.tsv
@@ -4844,3 +4844,5 @@ mark-style	Japanese	Japońskie
 	Movie Clip	Klip filmowy
 @msg	name is empty	nazwa jest pusta
 @msg	no symbol named `{n}`	brak symbolu o nazwie `{n}`
+@msg	a mask has more than one art block	maska ma więcej niż jeden blok grafiki
+@msg	mask art ends outside a mask dictionary	grafika maski kończy się poza słownikiem maski
diff --git a/crates/ui-egui/src/i18n/pt-br.tsv b/crates/ui-egui/src/i18n/pt-br.tsv
index 63e725edf..52ddf636d 100644
--- a/crates/ui-egui/src/i18n/pt-br.tsv
+++ b/crates/ui-egui/src/i18n/pt-br.tsv
@@ -4916,3 +4916,5 @@ mark-style	Japanese	Japonesas
 # Symbol Options › Export Type
 @msg	name is empty	o nome está vazio
 @msg	no symbol named `{n}`	nenhum símbolo chamado `{n}`
+@msg	a mask has more than one art block	uma máscara contém mais de um bloco de arte
+@msg	mask art ends outside a mask dictionary	a arte da máscara termina fora de um dicionário de máscara
diff --git a/crates/ui-egui/src/i18n/ru.tsv b/crates/ui-egui/src/i18n/ru.tsv
index ee7c6e5cd..d7967aeba 100644
--- a/crates/ui-egui/src/i18n/ru.tsv
+++ b/crates/ui-egui/src/i18n/ru.tsv
@@ -4572,3 +4572,5 @@ lighting	Light	Свет
 	Movie Clip	Видеоклип
 @msg	name is empty	имя пустое
 @msg	no symbol named `{n}`	нет символа с именем `{n}`
+@msg	a mask has more than one art block	маска содержит более одного блока графики
+@msg	mask art ends outside a mask dictionary	графика маски заканчивается за пределами словаря маски
diff --git a/crates/ui-egui/src/i18n/sv.tsv b/crates/ui-egui/src/i18n/sv.tsv
index fb6ef9f23..1f623cfbc 100644
--- a/crates/ui-egui/src/i18n/sv.tsv
+++ b/crates/ui-egui/src/i18n/sv.tsv
@@ -4955,3 +4955,5 @@ theme	Appearance	Utseende
 	Movie Clip	Filmklipp
 @msg	name is empty	namnet är tomt
 @msg	no symbol named `{n}`	ingen symbol med namnet `{n}`
+@msg	a mask has more than one art block	en mask innehåller mer än ett grafikblock
+@msg	mask art ends outside a mask dictionary	maskens grafik slutar utanför en maskordlista
diff --git a/crates/ui-egui/src/i18n/uk.tsv b/crates/ui-egui/src/i18n/uk.tsv
index d80b7657e..509f2507f 100644
--- a/crates/ui-egui/src/i18n/uk.tsv
+++ b/crates/ui-egui/src/i18n/uk.tsv
@@ -4556,3 +4556,5 @@ lighting	Light	Світло
 	Movie Clip	Кліп
 @msg	name is empty	ім’я порожнє
 @msg	no symbol named `{n}`	немає символу з назвою `{n}`
+@msg	a mask has more than one art block	маска містить більше одного блоку графіки
+@msg	mask art ends outside a mask dictionary	графіка маски закінчується за межами словника маски
diff --git a/crates/ui-egui/src/i18n/vi.tsv b/crates/ui-egui/src/i18n/vi.tsv
index 68faa3b09..250c3e2bc 100644
--- a/crates/ui-egui/src/i18n/vi.tsv
+++ b/crates/ui-egui/src/i18n/vi.tsv
@@ -4556,3 +4556,5 @@ theme	Appearance	Giao diện
 	Movie Clip	Clip phim
 @msg	name is empty	tên trống
 @msg	no symbol named `{n}`	không có biểu tượng nào tên `{n}`
+@msg	a mask has more than one art block	mặt nạ có nhiều hơn một khối đồ họa
+@msg	mask art ends outside a mask dictionary	đồ họa mặt nạ kết thúc bên ngoài từ điển mặt nạ