diff --git a/src/api/graphics.c b/src/api/graphics.c
index b43839c0..2b8b271c 100644
--- a/src/api/graphics.c
+++ b/src/api/graphics.c
@@ -637,6 +637,8 @@ int l_lovrGraphicsNewMesh(lua_State* L) {
 
       lua_pop(L, 1);
     }
+
+    lovrMeshUnmap(mesh);
   }
 
   vec_deinit(&format);
diff --git a/src/graphics/model.c b/src/graphics/model.c
index b3182d07..49126dc2 100644
--- a/src/graphics/model.c
+++ b/src/graphics/model.c
@@ -93,6 +93,7 @@ Model* lovrModelCreate(ModelData* modelData) {
   model->mesh = lovrMeshCreate(vertices.length / components, &format, MESH_TRIANGLES, MESH_STATIC);
   void* data = lovrMeshMap(model->mesh, 0, vertices.length / components);
   memcpy(data, vertices.data, vertices.length * sizeof(float));
+  lovrMeshUnmap(model->mesh);
   lovrMeshSetVertexMap(model->mesh, indices.data, indices.length);
 
   model->texture = NULL;
diff --git a/src/loaders/model.c b/src/loaders/model.c
index a55f7495..23278e0f 100644
--- a/src/loaders/model.c
+++ b/src/loaders/model.c
@@ -32,7 +32,7 @@ ModelData* lovrModelDataCreate(Blob* blob) {
   modelData->hasNormals = 0;
   modelData->hasTexCoords = 0;
 
-  unsigned int flags = aiProcessPreset_TargetRealtime_MaxQuality | aiProcess_OptimizeGraph;
+  unsigned int flags = aiProcessPreset_TargetRealtime_MaxQuality | aiProcess_OptimizeGraph | aiProcess_FlipUVs;
   const struct aiScene* scene = aiImportFileFromMemory(blob->data, blob->size, flags, NULL);
 
   // Meshes