#3335: Render Queue reads frames back once, pipelines GPU frames and picks the faster renderer

crates/engine/src/cmd/render_queue.rs

@@ -863,6 +863,9 @@ fn save_current_preview(s: &mut Session, p: &Value) -> Result<Value> {
         storage: s.storage_quota.as_deref(),
         label: "Save Current Preview".into(),
         nested_switches: s.prefs.general.switches_affect_nested_comps,
+
+        caches: None,
+        renderer: None,
     };
     let r = exporter.export(&job, &mut |_, _| true).map_err(EngineError::Other)?;
     s.toast(format!("Saved preview to {}", r.path));