diff --git a/projects/MeshSubdiv/OSDPrimSubdiv.cpp b/projects/MeshSubdiv/OSDPrimSubdiv.cpp
index d0eb47c08f..1a4f88268d 100644
--- a/projects/MeshSubdiv/OSDPrimSubdiv.cpp
+++ b/projects/MeshSubdiv/OSDPrimSubdiv.cpp
@@ -132,7 +132,7 @@ static void osdPrimSubdiv(PrimitiveObject *prim, int levels, std::string edgeCre
     const int maxlevel=levels;
     if (maxlevel <= 0 || !prim->verts.size()) return;
 
-    if (prim->loops.size() && prim->loop_uvs.size() <= prim->loops.size())
+    if (prim->loops.size() && prim->loop_uvs.size())
         hasLoopUVs = false;
 
         //nCoarseVerts=0,
diff --git a/zeno/include/zeno/types/PrimitiveObject.h b/zeno/include/zeno/types/PrimitiveObject.h
index 5bbacc8ff5..b982ebc12a 100644
--- a/zeno/include/zeno/types/PrimitiveObject.h
+++ b/zeno/include/zeno/types/PrimitiveObject.h
@@ -27,8 +27,8 @@ struct PrimitiveObject : IObjectClone<PrimitiveObject> {
     AttrVector<vec2i> polys;
     AttrVector<vec2i> edges;
 
-    std::vector<vec2f> uvs;
-    std::vector<int> loop_uvs;
+    AttrVector<vec2f> uvs;
+    AttrVector<int> loop_uvs;
 
     std::shared_ptr<MaterialObject> mtl;
     std::shared_ptr<InstancingObject> inst;
diff --git a/zeno/src/funcs/ObjectCodecPrimitive.cpp b/zeno/src/funcs/ObjectCodecPrimitive.cpp
index e8049d9615..bd10affdd2 100644
--- a/zeno/src/funcs/ObjectCodecPrimitive.cpp
+++ b/zeno/src/funcs/ObjectCodecPrimitive.cpp
@@ -82,7 +82,9 @@ std::shared_ptr<PrimitiveObject> decodePrimitiveObject(const char *it) {
     decodeAttrVector(obj->quads, it);
     decodeAttrVector(obj->loops, it);
     decodeAttrVector(obj->polys, it);
+    decodeAttrVector(obj->edges, it);
     decodeAttrVector(obj->uvs, it);
+    decodeAttrVector(obj->loop_uvs, it);
     if (*it++ == '1') {
         obj->mtl = std::make_shared<MaterialObject>();
         obj->mtl->deserialize(it);
@@ -99,7 +101,9 @@ bool encodePrimitiveObject(PrimitiveObject const *obj, std::back_insert_iterator
     encodeAttrVector(obj->quads, it);
     encodeAttrVector(obj->loops, it);
     encodeAttrVector(obj->polys, it);
+    encodeAttrVector(obj->edges, it);
     encodeAttrVector(obj->uvs, it);
+    encodeAttrVector(obj->loop_uvs, it);
     if (obj->mtl) {
         *it++ = '1';
         for (char c: obj->mtl->serialize())
diff --git a/zeno/src/nodes/neo/PrimCodecUVs.cpp b/zeno/src/nodes/neo/PrimCodecUVs.cpp
index e836b9e374..01a142d83c 100644
--- a/zeno/src/nodes/neo/PrimCodecUVs.cpp
+++ b/zeno/src/nodes/neo/PrimCodecUVs.cpp
@@ -8,13 +8,13 @@ namespace zeno {
 
 // 'smart loop_uvs' to 'qianqiang loop.attr(uv)'
 ZENO_API void primDecodeUVs(PrimitiveObject *prim) {
-    if (prim->loops.size() && prim->loop_uvs.size() <= prim->loops.size()) {
+    if (prim->loops.size() && prim->loop_uvs.size()) {
         auto &loop_uvs = prim->loop_uvs;
         auto &attr_uv = prim->loops.add_attr<vec3f>("uv"); // todo: support vec2f in attr...
         /*attr_uv.resize(prim->loop_uvs.size());*/
         size_t n = std::min(loop_uvs.size(), attr_uv.size());
         if (n == 0) zeno::log_warn("primDecodeUVs: no loops but have loop_uvs");
-        if (prim->uvs.size() == 0) zeno::log_error("primDecodeUVs: no uvs but have loop_uvs");
+        else if (prim->uvs.size() == 0) zeno::log_error("primDecodeUVs: no uvs but have loop_uvs");
         parallel_for(n, [&] (size_t i) {
             auto uv = prim->uvs[loop_uvs[i]];
             attr_uv[i] = {uv[0], uv[1], 0};
@@ -27,7 +27,7 @@ ZENO_API void primDecodeUVs(PrimitiveObject *prim) {
 
 // 'smart loop_uvs' to 'veryqianqiang vert.attr(uv)'
 ZENO_API void primLoopUVsToVerts(PrimitiveObject *prim) {
-    if (prim->loops.size() && prim->loop_uvs.size() <= prim->loops.size()) {
+    if (prim->loops.size() && prim->loop_uvs.size()) {
         auto &loop_uvs = prim->loop_uvs;
         auto &vert_uv = prim->verts.add_attr<vec3f>("uv"); // todo: support vec2f in attr...
         /*attr_uv.resize(prim->loop_uvs.size());*/
diff --git a/zeno/src/nodes/neo/PrimExtrude.cpp b/zeno/src/nodes/neo/PrimExtrude.cpp
index 3cd8121482..5509096f8c 100644
--- a/zeno/src/nodes/neo/PrimExtrude.cpp
+++ b/zeno/src/nodes/neo/PrimExtrude.cpp
@@ -8,6 +8,7 @@
 #include <zeno/extra/TempNode.h>
 #include <zeno/core/INode.h>
 #include <zeno/zeno.h>
+#include <numeric>
 #include <set>
 
 namespace zeno {
@@ -24,9 +25,12 @@ struct PrimExtrude : INode {
         auto sourceMaskAttrO = get_input2<std::string>("sourceMaskAttrO");
         auto autoFlipFace = get_input2<bool>("autoFlipFace");
         auto autoFindEdges = get_input2<bool>("autoFindEdges");
+        auto averagedExtrude = get_input2<bool>("averagedExtrude");
 
         auto prim2 = std::make_shared<PrimitiveObject>(*prim);
 
+        bool flipNewFace = autoFlipFace && extrude < 0;
+        bool flipOldFace = autoFlipFace && extrude > 0;
         if (autoFindEdges && !maskAttr.empty()) {
             AttrVector<vec2i> oldlines = std::move(prim2->lines);
             primWireframe(prim2.get(), false);
@@ -64,6 +68,13 @@ struct PrimExtrude : INode {
             std::string tmpNormAttr = "%%extrude2";
             primCalcNormal(prim2.get(), 1.0f, tmpNormAttr);
             p2norms = std::move(prim2->verts.attr<vec3f>(tmpNormAttr));
+            if (averagedExtrude) {
+                auto avgdir = std::reduce(p2norms.begin(), p2norms.end(), vec3f(0));
+                avgdir = normalizeSafe(avgdir);
+                offset += extrude * avgdir;
+                extrude = 0;
+                p2norms.clear();
+            }
             prim2->verts.erase_attr(tmpNormAttr);
         }
 
@@ -76,8 +87,6 @@ struct PrimExtrude : INode {
             //prim2->verts.erase_attr(tmpInsetAttr);
         }
 
-        bool flipNewFace = autoFlipFace && extrude < 0;
-        bool flipOldFace = autoFlipFace && extrude > 0;
         if (flipNewFace) {
             primFlipFaces(prim2.get());
         }
@@ -202,6 +211,7 @@ ZENDEFNODE(PrimExtrude, {
     {"string", "sourceMaskAttrO", ""},
     {"bool", "autoFlipFace", "1"},
     {"bool", "autoFindEdges", "1"},
+    {"bool", "averagedExtrude", "0"},
     },
     {
     {"PrimitiveObject", "prim"},
diff --git a/zeno/src/nodes/neo/PrimSepTris.cpp b/zeno/src/nodes/neo/PrimSepTris.cpp
index 4f1acc2f70..c311a94ee7 100644
--- a/zeno/src/nodes/neo/PrimSepTris.cpp
+++ b/zeno/src/nodes/neo/PrimSepTris.cpp
@@ -135,7 +135,7 @@ ZENO_API void primSepTriangles(PrimitiveObject *prim, bool smoothNormal, bool ke
                 new_uv[b + i * 6 + 5] = uv3[i];
             }
         }
-        if (prim->loops.size() && prim->loop_uvs.size() <= prim->loops.size()) {
+        if (prim->loops.size() && prim->loop_uvs.size()) {
             auto &loop_uvs = prim->loop_uvs;
             size_t b = 0;
             std::vector<int> v(loopcount * 3);
diff --git a/zeno/src/nodes/neo/WriteObjPrim.cpp b/zeno/src/nodes/neo/WriteObjPrim.cpp
index ed78233091..251cfa8012 100644
--- a/zeno/src/nodes/neo/WriteObjPrim.cpp
+++ b/zeno/src/nodes/neo/WriteObjPrim.cpp
@@ -22,7 +22,7 @@ void dump_obj(PrimitiveObject *prim, std::ostream &fout) {
     for (auto const &[x, y, z]: prim->verts) {
         fout << "v " << x << ' ' << y << ' ' << z << '\n';
     }
-    if (prim->loops.size() && prim->loop_uvs.size() <= prim->loops.size()) {
+    if (prim->loops.size() && prim->loop_uvs.size()) {
         auto &loop_uvs = prim->loop_uvs;
         for (auto const &[x, y]: prim->uvs) {
             fout << "vt " << x << ' ' << y << '\n';
diff --git a/zenovis/src/bate/GraphicPrimitive.cpp b/zenovis/src/bate/GraphicPrimitive.cpp
index 59c144901a..e96c14d813 100644
--- a/zenovis/src/bate/GraphicPrimitive.cpp
+++ b/zenovis/src/bate/GraphicPrimitive.cpp
@@ -335,7 +335,7 @@ struct ZhxxGraphicPrimitive final : IGraphicDraw {
         }
         if (thePrmHasFaces) {
             zeno::log_trace("demoting faces");
-            if (prim->loops.size() && prim->loop_uvs.size() <= prim->loops.size()) {
+            if (prim->loops.size() && prim->loop_uvs.size()) {
                 zeno::primDecodeUVs(&*prim);//loop_uvs to loop.attr("uv")
             }
             zeno::primTriangulateQuads(&*prim);