diff --git a/examples/vector/main.go b/examples/vector/main.go
index 2b6e06cc3..02b877259 100644
--- a/examples/vector/main.go
+++ b/examples/vector/main.go
@@ -43,7 +43,7 @@ const (
 	screenHeight = 480
 )
 
-func drawEbitenText(screen *ebiten.Image) {
+func drawEbitenText(screen *ebiten.Image, counter int) {
 	var path vector.Path
 
 	// E
@@ -119,6 +119,7 @@ func drawEbitenText(screen *ebiten.Image) {
 		vs[i].ColorR = 0xdb / float32(0xff)
 		vs[i].ColorG = 0x56 / float32(0xff)
 		vs[i].ColorB = 0x20 / float32(0xff)
+		vs[i].ColorA = float32((counter/30)%2)/2 + 0.5
 	}
 	screen.DrawTriangles(vs, is, emptySubImage, op)
 }
@@ -245,7 +246,7 @@ func (g *Game) Update() error {
 
 func (g *Game) Draw(screen *ebiten.Image) {
 	screen.Fill(color.White)
-	drawEbitenText(screen)
+	drawEbitenText(screen, g.counter)
 	drawEbitenLogo(screen, 20, 90)
 	drawArc(screen, g.counter)
 	drawWave(screen, g.counter)
diff --git a/internal/graphicsdriver/metal/graphics.go b/internal/graphicsdriver/metal/graphics.go
index 535d6d60b..d702dbf42 100644
--- a/internal/graphicsdriver/metal/graphics.go
+++ b/internal/graphicsdriver/metal/graphics.go
@@ -737,13 +737,13 @@ func (g *Graphics) Initialize() error {
 		BackFaceStencil: mtl.StencilDescriptor{
 			StencilFailureOperation:   mtl.StencilOperationKeep,
 			DepthFailureOperation:     mtl.StencilOperationKeep,
-			DepthStencilPassOperation: mtl.StencilOperationKeep,
+			DepthStencilPassOperation: mtl.StencilOperationZero,
 			StencilCompareFunction:    mtl.CompareFunctionNotEqual,
 		},
 		FrontFaceStencil: mtl.StencilDescriptor{
 			StencilFailureOperation:   mtl.StencilOperationKeep,
 			DepthFailureOperation:     mtl.StencilOperationKeep,
-			DepthStencilPassOperation: mtl.StencilOperationKeep,
+			DepthStencilPassOperation: mtl.StencilOperationZero,
 			StencilCompareFunction:    mtl.CompareFunctionNotEqual,
 		},
 	})
diff --git a/internal/graphicsdriver/opengl/context_desktop.go b/internal/graphicsdriver/opengl/context_desktop.go
index 1aee657fe..85c6d3d70 100644
--- a/internal/graphicsdriver/opengl/context_desktop.go
+++ b/internal/graphicsdriver/opengl/context_desktop.go
@@ -520,6 +520,6 @@ func (c *context) beginStencilWithEvenOddRule() {
 
 func (c *context) endStencilWithEvenOddRule() {
 	gl.StencilFunc(gl.NOTEQUAL, 0x00, 0xff)
-	gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
+	gl.StencilOp(gl.KEEP, gl.KEEP, gl.ZERO)
 	gl.ColorMask(true, true, true, true)
 }
diff --git a/internal/graphicsdriver/opengl/context_js.go b/internal/graphicsdriver/opengl/context_js.go
index ce44ff9eb..12e09c92d 100644
--- a/internal/graphicsdriver/opengl/context_js.go
+++ b/internal/graphicsdriver/opengl/context_js.go
@@ -660,6 +660,6 @@ func (c *context) beginStencilWithEvenOddRule() {
 func (c *context) endStencilWithEvenOddRule() {
 	gl := c.gl
 	gl.stencilFunc.Invoke(gles.NOTEQUAL, 0x00, 0xff)
-	gl.stencilOp.Invoke(gles.KEEP, gles.KEEP, gles.KEEP)
+	gl.stencilOp.Invoke(gles.KEEP, gles.KEEP, gles.ZERO)
 	gl.colorMask.Invoke(true, true, true, true)
 }
diff --git a/internal/graphicsdriver/opengl/context_mobile.go b/internal/graphicsdriver/opengl/context_mobile.go
index e74aa6fdf..f0b65a248 100644
--- a/internal/graphicsdriver/opengl/context_mobile.go
+++ b/internal/graphicsdriver/opengl/context_mobile.go
@@ -488,6 +488,6 @@ func (c *context) beginStencilWithEvenOddRule() {
 
 func (c *context) endStencilWithEvenOddRule() {
 	c.ctx.StencilFunc(gles.NOTEQUAL, 0x00, 0xff)
-	c.ctx.StencilOp(gles.KEEP, gles.KEEP, gles.KEEP)
+	c.ctx.StencilOp(gles.KEEP, gles.KEEP, gles.ZERO)
 	c.ctx.ColorMask(true, true, true, true)
 }