diff --git a/manimlib/mobject/types/vectorized_mobject.py b/manimlib/mobject/types/vectorized_mobject.py
index d597e057..79b04bf6 100644
--- a/manimlib/mobject/types/vectorized_mobject.py
+++ b/manimlib/mobject/types/vectorized_mobject.py
@@ -1053,8 +1053,10 @@ class VMobject(Mobject):
         null2 = (iti[0::3] - 1 == iti[1::3]) & (iti[0::3] - 2 == iti[2::3])
         inner_tri_indices = iti[~(null1 | null2).repeat(3)]
 
-        outer_tri_indices = self.get_outer_vert_indices()
-        tri_indices = np.hstack([outer_tri_indices, inner_tri_indices])
+        ovi = self.get_outer_vert_indices()
+        # Flip outer triangles with negative orientation
+        ovi[0::3][concave_parts], ovi[2::3][concave_parts] = ovi[2::3][concave_parts], ovi[0::3][concave_parts]
+        tri_indices = np.hstack([ovi, inner_tri_indices])
         self.triangulation = tri_indices
         self.needs_new_triangulation = False
         return tri_indices
diff --git a/manimlib/shaders/quadratic_bezier_fill/geom.glsl b/manimlib/shaders/quadratic_bezier_fill/geom.glsl
index fae7998b..1326c365 100644
--- a/manimlib/shaders/quadratic_bezier_fill/geom.glsl
+++ b/manimlib/shaders/quadratic_bezier_fill/geom.glsl
@@ -31,7 +31,7 @@ const vec2 SIMPLE_QUADRATIC[3] = vec2[3](
 
 void emit_triangle(vec3 points[3], vec4 v_color[3]){
     vec3 unit_normal = get_unit_normal(points[0], points[1], points[2]);
-    orientation = sign(unit_normal.z);
+    orientation = winding ? sign(unit_normal.z) : 1.0;
 
     for(int i = 0; i < 3; i++){
         uv_coords = SIMPLE_QUADRATIC[i];