diff --git a/src/lib/tvgPicture.cpp b/src/lib/tvgPicture.cpp
index 56f447d8..b6f47871 100644
--- a/src/lib/tvgPicture.cpp
+++ b/src/lib/tvgPicture.cpp
@@ -123,8 +123,11 @@ const uint32_t* Picture::data(uint32_t* w, uint32_t* h) const noexcept
 
 Result Picture::mesh(const Polygon* triangles, const uint32_t triangleCnt) noexcept
 {
-    if (pImpl->mesh(triangles, triangleCnt)) return Result::Success;
-    return Result::Unknown;
+    if (!triangles && triangleCnt > 0) return Result::InvalidArguments;
+    if (triangles && triangleCnt == 0) return Result::InvalidArguments;
+
+    pImpl->mesh(triangles, triangleCnt);
+    return Result::Success;
 }
 
 
diff --git a/src/lib/tvgPictureImpl.h b/src/lib/tvgPictureImpl.h
index 0ad7e036..8bbb745d 100644
--- a/src/lib/tvgPictureImpl.h
+++ b/src/lib/tvgPictureImpl.h
@@ -252,7 +252,7 @@ struct Picture::Impl
         return Result::Success;
     }
 
-    bool mesh(const Polygon* triangles, const uint32_t triangleCnt)
+    void mesh(const Polygon* triangles, const uint32_t triangleCnt)
     {
         if (triangles && triangleCnt > 0) {
             this->triangleCnt = triangleCnt;
@@ -263,7 +263,6 @@ struct Picture::Impl
             this->triangles = nullptr;
             this->triangleCnt = 0;
         }
-        return true;
     }
 
     Paint* duplicate()