More cleanup

diff --git a/sparse_strips/vello_common/src/strip.rs b/sparse_strips/vello_common/src/strip.rs
index a45d562..f4a36d5 100644
--- a/sparse_strips/vello_common/src/strip.rs
+++ b/sparse_strips/vello_common/src/strip.rs

@@ -282,11 +282,8 @@
                     ));
                 }
 
-                if USE_EARLY_CULL {
+                if USE_EARLY_CULL && !is_sentinel {
                     for row in (prev_tile.y + 1)..tile.y {
-                        if is_sentinel {
-                            break;
-                        }
                         winding_delta = row_windings[row as usize] as i32;
                         if should_fill(winding_delta) {
                             strip_buf.push(Strip::new(
@@ -304,12 +301,7 @@
                         }
                     }
 
-                    winding_delta = if !is_sentinel {
-                        row_windings[tile.y as usize] as i32
-                    } else {
-                        0
-                    };
-
+                    winding_delta = row_windings[tile.y as usize] as i32;
                     if should_fill(winding_delta) && tile.x != 0 {
                         strip_buf.push(Strip::new(
                             0,

diff --git a/sparse_strips/vello_common/src/strip_generator.rs b/sparse_strips/vello_common/src/strip_generator.rs
index 02998be..5e3cfad 100644
--- a/sparse_strips/vello_common/src/strip_generator.rs
+++ b/sparse_strips/vello_common/src/strip_generator.rs

@@ -154,15 +154,16 @@
             self.row_winding.fill(0);
         }
 
+        let culling_opportunity;
         if self.use_early_culling {
-            self.use_early_culling = self.tiles.make_tiles_analytic_aa::<true>(
+            culling_opportunity = self.tiles.make_tiles_analytic_aa::<true>(
                 &self.line_buf,
                 self.width,
                 self.height,
                 &mut self.row_winding,
             )
         } else {
-            self.use_early_culling = self.tiles.make_tiles_analytic_aa::<false>(
+            culling_opportunity = self.tiles.make_tiles_analytic_aa::<false>(
                 &self.line_buf,
                 self.width,
                 self.height,
@@ -205,6 +206,8 @@
                 &self.row_winding,
             );
         }
+
+        self.use_early_culling = culling_opportunity;
     }
 
     /// Reset the strip generator.