diff --git a/examples/glImaging/glImaging.cpp b/examples/glImaging/glImaging.cpp
index 2cebbdb5..ac4b275d 100644
--- a/examples/glImaging/glImaging.cpp
+++ b/examples/glImaging/glImaging.cpp
@@ -115,7 +115,9 @@ public:
         ss << "#define OSD_ENABLE_PATCH_CULL\n";
         ss << "#define GEOMETRY_OUT_LINE\n";
 
-        ss << "#define OSD_PATCH_ENABLE_SINGLE_CREASE\n";
+        if (desc.IsAdaptive() && type == Far::PatchDescriptor::REGULAR) {
+            ss << "#define OSD_PATCH_ENABLE_SINGLE_CREASE\n";
+        }
 
         // include osd PatchCommon
         ss << Osd::GLSLPatchShaderSource::GetCommonShaderSource();
diff --git a/examples/glImaging/shader.glsl b/examples/glImaging/shader.glsl
index 0cd1e598..8ad8ec19 100644
--- a/examples/glImaging/shader.glsl
+++ b/examples/glImaging/shader.glsl
@@ -138,12 +138,18 @@ void main()
 layout(triangle_strip, max_vertices = EDGE_VERTS) out;
 in block {
     OutputVertex v;
+#if defined OSD_PATCH_ENABLE_SINGLE_CREASE
+    vec2 vSegments;
+#endif
     OSD_USER_VARYING_DECLARE
 } inpt[EDGE_VERTS];
 
 out block {
     OutputVertex v;
     noperspective out vec4 edgeDistance;
+#if defined OSD_PATCH_ENABLE_SINGLE_CREASE
+    vec2 vSegments;
+#endif
     OSD_USER_VARYING_DECLARE
 } outpt;
 
@@ -157,6 +163,10 @@ void emit(int index, vec3 normal)
     outpt.v.normal = normal;
 #endif
 
+#if defined OSD_PATCH_ENABLE_SINGLE_CREASE
+    outpt.vSegments = inpt[index].vSegments;
+#endif
+
     outpt.color = inpt[index].color;
 
     gl_Position = ProjectionMatrix * inpt[index].v.position;
@@ -187,6 +197,7 @@ void emit(int index, vec3 normal, vec4 edgeVerts[EDGE_VERTS])
         edgeDistance(edgeVerts[index], edgeVerts[1], edgeVerts[2]);
 #ifdef PRIM_TRI
     outpt.edgeDistance[2] =
+    outpt.edgeDistance[3] =
         edgeDistance(edgeVerts[index], edgeVerts[2], edgeVerts[0]);
 #endif
 #ifdef PRIM_QUAD
@@ -272,6 +283,9 @@ void main()
 in block {
     OutputVertex v;
     noperspective in vec4 edgeDistance;
+#if defined OSD_PATCH_ENABLE_SINGLE_CREASE
+    vec2 vSegments;
+#endif
     OSD_USER_VARYING_DECLARE
 } inpt;
 
@@ -346,8 +360,7 @@ getAdaptivePatchColor(ivec3 patchParam)
 
 #if defined OSD_PATCH_ENABLE_SINGLE_CREASE
     // check this after boundary/corner since single crease patch also has edgeCount.
-    float sharpness = OsdGetPatchSharpness(patchParam);
-    if (sharpness > 0) {
+    if (inpt.vSegments.y > 0) {
         patchType = 1;
     }
 #elif defined OSD_PATCH_GREGORY