diff --git a/packages/layers/src/polygon/shaders/extrude/polygon_extrude_frag.glsl b/packages/layers/src/polygon/shaders/extrude/polygon_extrude_frag.glsl
index 8740925379..d594899aaf 100644
--- a/packages/layers/src/polygon/shaders/extrude/polygon_extrude_frag.glsl
+++ b/packages/layers/src/polygon/shaders/extrude/polygon_extrude_frag.glsl
@@ -16,7 +16,8 @@ void main() {
   float sidey = styleMappingMat[3][0];
   float lightWeight = styleMappingMat[3][1];
 
-  if(isSide < 1.0) {
+  // Tip: 部分机型 GPU 计算精度兼容
+  if(isSide < 0.999) {
     // side face
     if(u_sidesurface < 1.0) {
       discard;
diff --git a/packages/layers/src/polygon/shaders/extrude/polygon_extrude_picklight_frag.glsl b/packages/layers/src/polygon/shaders/extrude/polygon_extrude_picklight_frag.glsl
index 8139c372b1..47dfac059f 100644
--- a/packages/layers/src/polygon/shaders/extrude/polygon_extrude_picklight_frag.glsl
+++ b/packages/layers/src/polygon/shaders/extrude/polygon_extrude_picklight_frag.glsl
@@ -16,7 +16,8 @@ void main() {
   float sidey = styleMappingMat[3][0];
   float lightWeight = styleMappingMat[3][1];
 
-  if(isSide < 1.0) {
+  // Tip: 部分机型 GPU 计算精度兼容
+  if(isSide < 0.999) {
     // side face
     if(u_sidesurface < 1.0) {
       discard;
diff --git a/packages/layers/src/polygon/shaders/extrude/polygon_extrudetex_frag.glsl b/packages/layers/src/polygon/shaders/extrude/polygon_extrudetex_frag.glsl
index ad99997d59..1230a7bb6d 100644
--- a/packages/layers/src/polygon/shaders/extrude/polygon_extrudetex_frag.glsl
+++ b/packages/layers/src/polygon/shaders/extrude/polygon_extrudetex_frag.glsl
@@ -19,7 +19,8 @@ void main() {
   float topV = styleMappingMat[2][3];
 
   float sidey = styleMappingMat[3][0];
-  if(isSide < 1.0) {
+  // Tip: 部分机型 GPU 计算精度兼容
+  if(isSide < 0.999) {
     // side face
     if(u_sidesurface < 1.0) {
       discard;